Showing posts with label climate change. Show all posts
Showing posts with label climate change. Show all posts

Wednesday, 30 May 2012

Speaking Out Against the Northern Gateway Pipeline

“Our Nations are the wall
this pipeline will not break
through. Our lands and
waters are not for sale, not
at any price. What Enbridge is offering is the destruction of our lands to build their
project, and the risk of oil spills for decades
to come which could hurt everyone’s kids
and grandkids.”


Enbridge Inc.,  a Calgary, Alberta based company focused on three core businesses: crude oil and liquids pipelines, natural gas transportation and distribution, and green energy, has proposed an estimated $5.5-billion 1,172-kilometre twin pipeline running from Bruderhein, Alberta to Kitimat, BC.
Eastbound, the pipeline imports natural gas condensate to the Tar Sands.
Westbound it will export crude oil to new marine terminal in Kitimat where it will be transported to Asian markets by oil tankers.
  The pipeline project brings about environmental, Aboriginal land claims, safety, energy security, and long-term economic concerns. Most prominently the pipeline
  • Compromises the lifestyles of First Nations who depend on the region’s lands and waters for their livelihoods, culture, and health.
  • Threatens the economic well-being of the communities of British Columbia that depend on fisheries and forests.
  • Poses potential devastation from a major oil spill from the pipeline or an oil supertanker, which could destroy economically important salmon habitat, as well as the habitat of Spirit Bears and grizzlies, and whales, orcas, and other marine life that depend on these rich coastal waters.
 Harm from an oil spill to the Great Bear Rainforest that the province and First Nations have worked hard to protect from unsustainable forestry practices and to shift to a conservation-based economy.
The case that this pipeline is needed is difficult to make based on the limited evidence presented by Enbridge. Instead of relying on the market to demonstrate demand for the project, in an unprecedented move, Enbridge is seeking regulatory approval for a pipeline without any proven commercial support from shippers and investors. Enbridge has failed to conduct a refinery-level demand analysis for the Northern Gateway pipeline, considered common practice in the industry. There is currently a glut of export pipeline capacity leaving western Canada. Current oil production in western Canada leaves 41 percent of existing export pipelines empty. Based on industry production estimates, no additional export pipelines are needed out of the tar sands for at least another 10 years.
In addition, Enbridge has not provided an adequate assessment of alternatives (as required under law), quantified the upstream environmental impacts from additional tar sands, or presented the full cost of the pipeline. As a result, it will be very difficult for Enbridge to make the case to government regulators that this pipeline is needed and in the interest of Canadians.

The Natural System Affected


Unlike other pipelines Enbridge has built, the route for the proposed Northern Gateway Pipeline crosses the rugged, mountainous terrain of the Northern Rockies and the Coast Mountains of British Columbia. The pipeline would crosses some 1,000 streams and rivers, including sensitive salmon spawning habitat in the upper Fraser, Skeena, and Kitimat watersheds. Five important salmon rivers that would be impacted are the Stuart River, Morice River, Copper River, Kitimat River and Salmon River. Currently, the Northern Gateway Pipeline is opposed by the nine Coastal First Nations, as well as many of the inland First Nation along the pipeline route. The pipeline would pass through the unceded traditional territory (which means that it has not "relinquished title to its land to the government by treaty or otherwise." ) of dozens of BC First Nations and the Great Bear Rainforest – the last intact temperate rainforest in the world home to thousands of species of plants, birds and animals. The pipeline would also cross 1,000 streams and rivers, many of which are key habitat for salmon and other species.

Great Bear Rainforest:
The Northern Gateway pipeline would carry 500,000 barrels a day of the world’s dirtiest oil from the Alberta tar sands directly through the bear’s rainforest home.
A serious pipeline break could happen at any time as a river of toxic oil is pumped from the Alberta tar sands across the spectacular mountains and rivers of British Columbia. But it gets worse: When that oil reaches the Spirit Bear Coast, it will be loaded onto supertankers that will have to navigate treacherous reefs, hurricane-force winds and a channel six times narrower than the passage that sank the Exxon Valdez! Those oil-laden tankers will need to pass Princess Royal Island, the last stronghold of the Spirit Bear, as they churn through wildlife-filled waters that are home to orcas, humpbacks, fin whales and Steller sea lions.

Salmon:
The Enbridge oil sands pipelines would cross and in some places run parallel to major salmon rivers in British Columbia’s Upper Fraser, Skeena and Kitimat watersheds, which contain some of the highest quality habitat for wild salmon and steelhead trout in Canada. Chinook, sockeye, chum, coho and pink salmon, as well as steelhead trout and many other fish species, use the rivers and lakes in these watersheds for spawning, rearing and migrating. Pipeline construction, ruptures and leaks all pose serious risks to salmon, making the Enbridge oil sands pipelines a toxic proposal for salmon and the communities that depend on them. Experience indicates that a spill of some sort will inevitably occur. In addition, the pipelines would affect salmon ecosystems that are already under stress from forestry, mining, agriculture and climate change.

Aboriginal Territory
If built, the Northern Gateway Pipeline would cross the territories of more than 50 First Nations groups. West of the Rocky Mountains, few First Nations have signed treaties with the Crown. Their rights and title to their traditional territories has been affirmed by the Supreme Court of Canada. Dozens of BC First Nations bands, empowered by a decade and a half of legal victories that have granted them a significant say over land in their traditional territories, oppose the project. The pipeline traverses much of their traditional lands and threatens habitat for wild salmon as mentioned above, which they have relied upon for sustenance for thousands of years

Oil Spills
Pipelines carry a serious risk of oil spills. Metal pipelines age and corrode over time, making them susceptible to ruptures. Pipelines are also at risk of breakage due to natural events such as landslides, and non-accidental events such as terrorism/vandalism.
The National Enery Board estimates large petroleum pipelines will experience a spill every 16 years for every 1000 kilometres in length. For a pipeline the size of the proposed Northern Gateway, meeting Canada’s federal standards would allow a spill of over 11 million litres a week (45 million litres a month) to remain undetected!
The report details the dangers of bitumen transportation and the risks of spills to the environment and the economy in a region that depends on healthy fisheries, lands, and waters. At risk from an oil spill would be the approximately $250 million annually from commercial fishing, $550 million annually from recreational fishing, and hundreds of millions of dollars from nature tourism. The wild salmon economy of the Skeena River alone has been valued at $110 million annually. The pipeline would cross over 1,000 streams and rivers through terrain prone to landslides.
In addition to the challenges posed by the corrosiveness of the diluted bitumen, the tankers would have to navigate narrow inlets, dotted with rocky outcroppings and underwater hazards. B.C.’s north coast is often battered by gale to storm force winds, with 10-metre waves and reduced visibility due to precipitation and fog. Hecate Straight, the shallow body of water between Haida Gwaii and the mainland that lies along the proposed tanker route, is considered the fourth most dangerous body of water in the world due to quickly changing winds and sea states.  A 2011 report from the Bulkley Valley Research Centre concluded that “the unstable mountainous terrain across west central B.C. is not a safe location for pipelines.
Eventually a landslide will sever a pipeline. An alternative safer route through B.C. needs investigation.”
Furthermore, the remoteness and inaccessibility of the Great Bear Rainforest would make an oil spill clean-up difficult. This would be compounded by the poor weather and rough seas which frequently make marine vessels and aircraft inoperable.

Effects




Effects on Aboriginal Communities: The Enbridge Gateway pipeline would affect the traditional territories and rights of at least 31 inland and 10 coastal First Nations. A recent study has concluded that the pipeline would have a devastating impact on cultural activities such as hunting, fishing, trapping, berry picking, spiritual activities, traditional village sites, recreational activities, and travel routes, with few if any corresponding benefits to First Nations communities.
Effects of tanker traffic: The threats from tanker traffic include air pollution, ballast discharge, and terminal accidents during loading and discharge. The day-to-day impacts of increased air pollution, noise, as well as the psychological stress of living with the risk of a pipeline or tanker spill are all health impacts that the communities along the pipeline and tanker traffic routes would face if a northern pipeline is built.
Contributing to Climate Change
Enbridge causes the release of
-per day 1,062,372,866,645,336,008
-per year 387,765,885,316,325,266,122,642,756
tonnes of carbon dioxide through its pipes .
Their entire business is based on expanding fossil fuel use at a time when the science is clear: we need to rapidly transition away from fossil fuels to clean energy in order to avoid climate changes that will impact future generations. Fossil fuels will eventually run out no matter how much we conserve them. Renewable energy sources such as hydrogen, solar, wind, tidal, and geothermal must be developed so there is not a major drop in available energy when the world supply of fossil fuels finally runs out.

Tar Sands Expansion
The pipeline will enable further expansion of the tar sands by providing an additional 525, 000 barrels per day. The production of the tar sands oil that would fill the pipe would
· Consumer 200  million barrels of processing water each year
· Destroy 12.5 square kilometres of land
· Produce 6.5 million tonnes of greenhouse gas emission per year, equivalent to the emissions from 1.6 million cars
Produce 25 million barrels of toxic tailings and contribute 2.7 million barrels of seepage from tailing lakes into groundwater and surface water each year.
Effects of Oil Spill Enbridge has not yet explained how it would clean up a spill in a fast-flowing river like the Morice-Bulkley or Skeena without causing further harm
Precedent:
Each year, oil pipelines in North America spill millions of liters of oil into the environment. In July 2010, Enbridge’s Lakehead pipeline ruptured near Battle Creek, Michigan, spilling an estimated 4 million liters of crude oil into the Kalamazoo River. It was the largest oil spill in Midwest U.S. history. Although Enbridge claims to have a rigorous pipeline safety program, there are serious questions being asked regarding both its maintenance of its pipelines and its response to the oil spill.
Some of the many effects on animals coming into contact with crude oil include:
- hypothermia and drowning of birds as the oil breaks down the insulating capabilities of feathers, makes them heavier and compromises flying ability
- hypothermia in some seal pups as the oil destroys insulating fur
- if oil is ingested, it can either poison the animal outright, make them extremely sick or create a level of toxins in their system that then causes poisoning further up the food chain. Birds and other animals often ingest oil when trying to clean themselves. Shellfish and corals are particularly at risk in these scenarios as they cannot escape from an oil slick.
- damage to the airways of birds and animals.
- damage to animal immune systems
- interruption of breeding and fouling of breeding grounds
- thinner bird and turtle egg shells and also damage to fish larvae, causing deformities
- damage to sea grass beds and other shelter/feeding areas
- tainting of algae, which perform a vital role in waterway ecosystems
Even once the oil appears to have dissipated, it can still lurk beneath the surface of beaches and the sea bed, severely affecting marine organisms that burrow, such as crabs, for literally decades. These burrowing creatures are also food for other animals, so the cycle of poisoning continues for many years.
There's really no aspect of a marine and coastal environment that is not in some way adversely affected by an oil spill. The closer the spill occurs to the shoreline, the more pronounced the damage will be due to coastal zones being home to more concentrated and diverse populations of marine, bird and animal life than far out to sea.
-Health risks associated with both oil and gas development and water contamination are serious. Oil spills pose the risk of exposure to polycyclic aromatic hydrocarbons (PAHs), a known carcinogen that persists long after an oil spill has occurred.  Condensate also contains persistent PAHs, although the impacts of condensate spills are less known. Land based oil spills carry the potential to contaminate drinking water through direct spills in rivers and streams, which will cause leaching and contamination to groundwater. Contamination from oil spills on fish and wildlife also pose serious health risks to humans
Bad Bitumen: Diluted bitumen—bitumen extracted from the tar sands and then diluted with natural gas liquids so that it can flow through pipes—differs from conventional crude: it is thicker, more acidic, more sulphuric, and more abrasive. Translation: diluted bitumen is more likely to cause corrosion in the pipelines through which it flows, as well as in the tankers that carry it through marine ecosystems. It is also harder to clean up. Conventional oil spill clean-up responses—which focus on containing and recovering oil floating on the surface of the water—are largely ineffective in the case of a bitumen spill, because bitumen will sink below the surface.
Effects on economy: The proposed pipeline could actually hurt non-oil based sectors of the Canadian economy. Economist and former Insurance Corporation of BC CEO, Robyn Allan, reported that an increase in oil prices will lead to "a decrease in family purchasing power, higher prices for industries who use oil as an input into their production process, higher rates of unemployment in non-oil industry related sectors, a decline in real GDP, a decline in government revenues, an increase in inflation, an increase in interest rates and further appreciation of the Canadian dollar." It is estimated that only 35-40 permanent jobs would be created in Kitimat from the marine terminal.
Effects on Fish regarding construction: Construction and operation can impact fish through the sediment that is released into streams and rivers during road building, road washouts and the construction of water crossings. Certain concentrations of sediment can kill fish directly. Sediments can also increase the amount of stress that fish experience, disrupting their feeding, growth, social behavior and susceptibility to disease. Sediments may also impact fish eggs and affect the survival of juvenile fish, and make water cloudy, interfering with light penetration, reducing the number of plants, and decreasing the habitat for insects that fish rely on for food. Road building practices by industry users can threaten salmon spawning grounds with siltation due to slumping of stream banks.
Further Effects on Wildlife and Land: In Alberta and northeastern British Columbia, the web of oil and gas development, including pipelines, has had harmful effects on many wildlife species, ranging from the loss of habitat to poisoning to a reduction in herd size and home range. Species in decline as a result of industrial development in Alberta include caribou, lynx, martin, fisher, wolverine and various bird species. The web of roads, well pads and related oil and gas facilities disrupts the way animals use the land for eating and cover, and affects their movement and migration patterns. Pipelines and related roads can contribute to fragmentation of habitat of animals such as grizzly bears. Roads and pipeline corridors also allow people easier access to an area, which can lead to increased hunting and poaching.

 Solutions



Policy Recommendations
  • ·         Federally legislate a permanent large oil tanker ban in accordance with the Coastal First Nations tanker ban and the Save the Fraser Declaration. While additional measures must be taken to make tankers and pipelines as safe as possible, the value of some areas is too high to risk any accidents. The Great Bear Rainforest, the world’s largest intact temperate rainforest, and the sensitive coastal waters and ecosystems surrounding it, should be permanently preserved and protected from the threat of oil spills. First Nations rights and laws over the resources of their traditional territories should be respected and their decisions on tanker traffic and pipelines through their territories should be mirrored by federal legislation.
  • ·          The Government of British Columbia should reject Northern coast oil tanker proposals as a matter of policy. While the federal government has ultimate regulatory responsibility for interprovincial pipelines and marine transportation, the provincial government has an important role to play in protecting communities and jobs in coastal industries, and protecting the environment. The government of British Columbia can and should show leadership to stop crude oil tanker developments from proceeding, as desired by 80 percent of British Columbians.
  • ·          Reject the proposed Northern Gateway pipeline project. The Joint Review Panel assessing the proposed project and the Cabinet Ministers with final decision making authority over its fate should reject the proposed Northern Gateway pipeline given the grave safety risks it would impose on a culturally, economically, and ecologically valuable region.
  • ·         Restrict further diluted bitumen pipeline development until adequate safety regulations are in place. Applications for diluted bitumen pipeline projects should be tabled until the National Energy Board evaluates the additional risks posed by diluted bitumen pipelines and ensures that adequate safety regulations are in place to address them.
  • Technical Recommendations
  • ·         Evaluate the need for new Canadian pipeline safety regulations. The current safety standards designed for conventional oil transportation in Canada may not provide adequate protection for communities and ecosystems in the vicinity of a diluted bitumen pipeline. The National Energy Board should analyze and address the potential risks associated with the transport of diluted bitumen and enact new regulations as necessary to address these risks.
  • ·         Commission an independent study on the impact of diluted bitumen on oil tankers. The effect of diluted bitumen on the cargo tanks of oil tankers is largely unknown. Transport Canada should commission comprehensive, independent analysis of the risks posed by transporting diluted bitumen by tanker to ensure that existing tanker traffic in southern British Columbia is designed to the highest possible safety standards.
  •  
  • ·         Ensure the oil pipeline industry takes adequate precautions for pipelines currently transporting diluted bitumen. Until appropriate regulations are in place, oil pipeline companies currently shipping diluted bitumen must use technology that effectively addresses the additional corrosion caused by diluted bitumen, to ensure that the smallest leaks can be detected in the shortest time possible and that companies have sufficient spill response assets in place to contain a diluted bitumen spill.
  • ·         Strengthen risk assessment from landslides and snow avalanches. No pipeline can withstand a significant landslide. Enbridge and the Canadian government should assess landslide and snow avalanche risks by widening the study corridor to include the steeper terrain where landslides and avalanches are more likely to originate. The use of airborne imaging technology would greatly increase the detection and recognition of landslide features. Pipeline regulations should be adopted that require new pipelines to avoid landslide prone routes.





Friday, 25 May 2012

Climate Change: Its a Fact (Interview with VIU professer Dr. Jeff Lewis)


Dr. Jeff Lewis has been a University College professor of Geography at Vancouver Island University, after receiving his PhD in Climate Modelling at the University of Victoria.  He is a faculty mentor for the Awareness of Climate change through Education and Research (ACER) project, a university based initiative to “promote a greater understanding of the science and social implications of climate change to students and the general public throughout Vancouver Island and coastal BC”. Lewis recently presented “Climate Change: Science and Public Perception”, as part of “The future of climate change: navigating the science in a changing political climate,” a VIU free public symposium on future of climate change. Jeff graciously obliged to be interviewed on the “hot” topic of Global Warming and Climate Change, in honour of Earth Day:

 What inspired you to become involved with spreading awareness about climate change?

I like big-scale, big-picture science and I think it’s incredibly important for not only for our generation, but future generations. I’d say its one of the biggest issues tackling humanity, certainly in the near future.

You are a faculty mentor for the Awareness of Climate change through Education and Research (ACER) project. Can you tell me what the project is about?

ACER is a student initiative, and there are two or three faculty instructors that help the students out, but its really just students themselves that are driving the project. ACER spreads awareness of climate change through education and research. What it is, is university students that go mainly into the high schools, but also other grades, and to the general public and talk about climate change and do demonstrations. Basically trying to raise awareness and answer questions people have about climate change. It’s been going very well. I think to date we’ve talked to over 5000 individuals.

Has the earth’s climate ever changed before?  How so?

Absolutely. The earth’s climate is changing all the time. There have been times where they’ve thought the earth was completely ice and snow for a period of time. And there have been times where it’s been warmer, absolutely. There are a number of different things that cause the earth’s climate to change, and at different time periods, are more important than others. Right now the composition of earth’s atmosphere, and specifically the greenhouse gases, are what’s causing the current climate to change. Most of its caused by people burning fossil fuels.

Will climate change affect different areas of the world equally?

No. One of the challenges of using the term “Global Warming” is that it implies that the whole world would warm at about the same time, and that is pretty far from the truth. With climate change, different regions will heat up faster than others. Lands will heat up faster than oceans, because oceans have a lot of thermal properties that help to stabilize the temperatures, where as land generally heats up and cools down faster. Around the North, in the Arctic and Antarctica, also heats up faster mainly because of powerful feedback. As the snow and ice melts, more sunlight can be absorbed by the darker water or land surface. That will further increase the temperature locally, and causes more warming. We’re already seeing that the Arctic is warming up anywhere from 2-4 times the rate of the rest of the world.

How do you respond to global warming and climate change sceptics who produce arguments such as "Climate's changed before" and "It's just the sun". Is there a consensus in the world that climate change is likely caused by greenhouse gases created by humans?

Part of it is just looking at the science. There are climate scientists all over the world. There is a global government group- the United Nations Intergovernmental Panel on Climate Change- and they review all the latest peer-viewed science and they write a big synthesis report. And the science from that group, as well National Science Academies, more than 95% of all the leading climate scientists are all pointing in the same direction: there’s an overwhelming burden of evidence that shows that the climate is changing, temperature is increasing as well other changes, and that humans are the main cause of that, mainly through burning fossil fuels. So there’s the science side of it, and then there’s just often arguing with specific comments that people have. Absolutely the sun causes the climate to change, at some points it’s more important than other causes of climate change, but right now the main driving force for climate change is changes in our atmosphere, and mainly our greenhouse gas concentrations going up.

Do you think people should be made to reduce their greenhouse gas emissions and thus their contribution towards climate change?  Why or why not?

I think that everything possible should be done to reduce greenhouse gas emissions, absolutely.

What are you doing to reduce your impact on climate change?

Great question. I try educating people a lot, and individually I make conscious decisions not to drive as much as I would otherwise. I attempt to eat a lot less meat. I try to eat local foods. I take public transportation where possible. I essentially just make decisions that have a lower impact on the environment.

Do you have any mentors, or people who inspire you in environmentalism?
David Suzuki has done a fantastic job. Andrew Weaver, as well, from the University of Victoria.

According to you how can youth take action in environment conservation?
I think youths should certainly educate themselves about the issues so that they are not misled. And I’d say a lot a lot of the movement with the social marketing and the technology that is allowing change to happen, the youth are going to be the most comfortable with it. Also at this stage, they have a lot to be lost because it’s their future that’s going to be severely impacted. I mean, we’re seeing climate change now but it’s only going to get worse in the future.

What do you think are some of the most important stories about climate change and/or global warming not being covered by the media?

I’d say the most important story is that along with changing the earth’s temperature, when we put more carbon dioxide into the atmosphere, the oceans absorb a lot of that carbon dioxide and it causes the ocean to become more acidic. As the oceans become more acidic, a lot of the life-forms of the ocean have shells made of calcium carbonate and will not be able to survive. So we’re looking at a huge impact to our global primary produces. That’s photosynthetic plants that produce oxygen. Our coral reefs around the world are heavily impacted by ocean acidification.

We’re seeing [the effects] now. Temperatures have already increased by half a degree in the last 40 years. We’re seeing that precipitation has changed. We’re seeing the ocean surface acidity has increased by 30%. Climate change is not something just for the future, its happening right now. It will get worse.

Friday, 13 April 2012

The Issue



The United Nations Intergovernmental Panel on Climate Change has gathered together the world’s most prominent climate scientists, who vigorously researched the possibility of global warming, and concluded their discoveries in a lengthy synthesis report. Conclusively, more than 95% of all the leading climate scientists are all pointing in the same direction: there’s an overwhelming burden of evidence that shows that the climate is changing, temperature is increasing and with it, detrimental effects follow. They also conclude that humans are the main cause of this issue, mainly through burning fossil fuels.
The “Industrialized Perspective” proclaims that applied science could satisfy human wants and garner prosperity, security and comfort. Sadly, we have paid a price. Smog-covered cities, polluted waterways, devastated forests and chemical dumps litter our environment. The beauty of nature is deteriorating, and so is nature’s capacity to sustain life. Man has placed himself in the danger of losing his humanity. Nature’s resources are not unlimited, but we show no heed to our actions. Economic benefits became the chief motivating force overlooking basic social values. Spiritual considerations, as well as moral and human factors are uprooted. The foundation of the problem is the belief that the means to achieve human well-being lies in increased production and consumption. Nature must be conquered and made subservient to the satisfaction of our desires.
Society’s demands for energy, transport and commodities have been easily satisfied by availability of cheap fossil fuel. Reliance on fossil fuels as our primary energy source has caused immense damage to human and environmental health, and is consuming health care and environmental damage re-construction dollars. It affects our ecosystems and the sustainability of life-forms. Forecasts indicate that unless steps are taken to reduce fossil fuel consumption, areas like Greater Vancouver will see a 60% increase in particulate emissions over the next 25 years, with corresponding increases in respiratory illness, hospitalizations and health care costs.
Global warming can be defined, hesitantly, as “A gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide, CFCs, and other pollutants”.
 
Research, both scientific and observational, has concluded that the Earth is a warmer place, due to increasing change of climate. Ten out of the eleven hottest years on record have occurred in the last two decades. Scientists globally with the Intergovernmental Panel on Climate Change (IPCC) tell us that during the past 100 years, the world’s surface air temperature increased on average of 0.6 degrees Celsius. Even one degree can affect the earth radically. In Canada, the average temperature for the first six months of 1998 was 2.7 degrees Celsius above normal, and in some areas of the Northwest Territories, 5 degrees Celsius above normal. There have also been temperature increases in the Arctic- spring arrives a week earlier. Drought, forest fires, severe storms, melting polar ice caps and the retreat of alpine glaciers also serve as observational evidence that the climate is changing. The earth’s climate is not just warming- it is becoming more unstable and unpredictable. Recorded below are prominent evidences that Global Warming is indeed happening.

Causes: 
The earth’s climate changes naturally. Some of these solar cycles- like the four glacial-interglacial swings during the past 400,000 years- extend over very long scales and can have large amplitudes of 5 to 6 degrees Celsius. For the past 10,000 years, the earth has been in the warm interglacial phase of such a cycle. Other solar cycles are much shorter, with the shortest being the 11 year sunspot cycle. Other natural causes of climate change include variations in ocean currents (Which can alter the distribution of heat and precipitation), the release of methane gas from arctic tundra and wetlands, and large eruptions of volcanoes (which can sporadically increase the concentration of atmospheric particles, blocking out more sunlight).
Still, for thousands of years, the Earth’s atmosphere has changed very little. Temperature and the balance of heat-trapping greenhouse gases have remained just right for humans, animals, and plants to survive. But today we’re having problems keeping this balance.
The Greenhouse Effect 
 
When the sun’s radiation reaches our atmosphere, some is reflected back into space and some passes through and is absorbed by the earth. Certain molecules in the atmosphere, called greenhouse gases, including water and carbon dioxide, allow sunlight to pass through them, but tend to reflect infrared or heat. Without greenhouse gases, Earth’s average temperature would be –19 degrees Celsius instead of +14 degrees Celsius—33 degrees Celsius colder!. Because greenhouse gases in the atmosphere act like a mirror and reflect back to the Earth a part of the heat radiation, which would otherwise be lost to space, the higher the concentration of green house gases like carbon dioxide in the atmosphere, the more heat energy is being reflected back to the Earth.

Because we burn fossil fuels to heat our homes, run our cars, produce electricity, and manufacture all sorts of products, we’re adding more greenhouse gases to the atmosphere. By increasing the amount of these gases, we’ve enhanced the warming capability of the natural greenhouse effect.
The main contributor to the enhanced greenhouse effect is carbon dioxide ) Globally, it accounts for over 60% of the enhanced greenhouse gas effect. In industrialised countries, carbon dioxide makes up more than 80% of greenhouse gas emissions.
The following are the highest contributors of greenhouse gas emissions:
•Carbon dioxide emissions from fossil fuel burning power plants:
•Carbon dioxide emissions from burning gasoline for transportation
•Methane emissions from animals, agriculture such as rice paddies, and from Arctic seabeds 
•Deforestation, especially tropical forests for wood, pulp, and farmland
•Increase in usage of chemical fertilizers on croplands



Text Box: More Floods:
Warming of the seas creates ‘thermal expansion’- where warm water begins to take up more space than cool water, making the sea’s surface level increase. Thermal expansion has already raised the height of the oceans by 4 to 8 inches (10 to 20cm), according to National Geographic.
Steadily melting glacial ice also adds significantly to the elevation in water surface level, and many low-lying or coastal communities and facilities will be under threat of eradication should the sea levels continue to rise.
Destructive storms 
The destructive power of hurricanes has increased by some 50% in the last 30 years, a figure that is closely connected with the rising temperature of the ocean 
-Warmer waters and more hurricanes:
As the temperature of oceans rises, so will the probability of more frequent and stronger hurricanes. Text Box: -Spread of disease: 
As northern countries warm, disease carrying insects migrate north, bringing plague and disease with them. 
-Increased probability and intensity of droughts and heat waves 
Although some areas of Earth will become wetter due to global warming, other areas will suffer serious droughts and heat waves. Africa will receive the worst of it, with more severe droughts also expected in Europe. 
-Economic Consequences 
Hurricanes cause billions of dollars in damage, diseases cost money to treat and control and conflicts exacerbate all of these.
Tsunamis
An increase in tsunamis may happen due to the fact that changes in the temperature of the oceans may affect streams and underwater geophysical masses producing environmental conditions that may precipitate seismic movements at a given place.
Cold Waves
A cold wave is characterized by a major plunge in temperature over a 24 hour period. It can be a devastating shock for crops and commerce, and also bring death and injury to humans and animals through accidents, hypothermia and starvation. More than 150 people lost their lives during the 2009 to 2010 winter after record low temperatures and abundant snowfall caused disruption to much of Europe .
More dangerous thunderstorms
A consequence of the increased amounts of humid air generated by global warming is that more thunderstorms will be triggered.
Death by smog
A powerful combination of vehicular fumes, ground-level ozone, airborne industrial pollution and the stagnant hot air associated with heat waves, smog represents an immediate and chronic health threat to those living in built-up urban areas.
Fires and wildfires
Dry areas of land already vulnerable to wildfires are likely to be ravaged by even more frequent and destructive episodes. In 2007, more than 3,000 fires brought destruction to Southeastern Europe thanks to a long summer that created arid and parched conditions.
-Polar ice caps melting:
This raises sea levels-. If all glaciers melted today the seas would rise about 230 feet (National Snow and Ice Data Center), melting ice caps will throw the global ecosystem out of balance (alter ocean currents, which regulate temperatures), endanger several species of animals, and intensifies global warming: if the ice caps melt, the only reflector is the ocean. Darker colors absorb sunlight, further warming the Earth.
The Effects: 

More Floods:
Warming of the seas creates ‘thermal expansion’- where warm water begins to take up more space than cool water, making the sea’s surface level increase. Thermal expansion has already raised the height of the oceans by 4 to 8 inches (10 to 20cm), according to National Geographic.
Steadily melting glacial ice also adds significantly to the elevation in water surface level, and many low-lying or coastal communities and facilities will be under threat of eradication should the sea levels continue to rise.
Destructive storms
The destructive power of hurricanes has increased by some 50% in the last 30 years, a figure that is closely connected with the rising temperature of the ocean
-Warmer waters and more hurricanes:
As the temperature of oceans rises, so will the probability of more frequent and stronger hurricanes.
 
-Spread of disease:
As northern countries warm, disease carrying insects migrate north, bringing plague and disease with them.
-Increased probability and intensity of droughts and heat waves
Although some areas of Earth will become wetter due to global warming, other areas will suffer serious droughts and heat waves. Africa will receive the worst of it, with more severe droughts also expected in Europe.
-Economic Consequences
Hurricanes cause billions of dollars in damage, diseases cost money to treat and control and conflicts exacerbate all of these.
 
Tsunamis
An increase in tsunamis may happen due to the fact that changes in the temperature of the oceans may affect streams and underwater geophysical masses producing environmental conditions that may precipitate seismic movements at a given place.
Cold Waves
A cold wave is characterized by a major plunge in temperature over a 24 hour period. It can be a devastating shock for crops and commerce, and also bring death and injury to humans and animals through accidents, hypothermia and starvation. More than 150 people lost their lives during the 2009 to 2010 winter after record low temperatures and abundant snowfall caused disruption to much of Europe .
More dangerous thunderstorms
A consequence of the increased amounts of humid air generated by global warming is that more thunderstorms will be triggered.

Tsunamis
An increase in tsunamis may happen due to the fact that changes in the temperature of the oceans may affect streams and underwater geophysical masses producing environmental conditions that may precipitate seismic movements at a given place.
Cold Waves
A cold wave is characterized by a major plunge in temperature over a 24 hour period. It can be a devastating shock for crops and commerce, and also bring death and injury to humans and animals through accidents, hypothermia and starvation. More than 150 people lost their lives during the 2009 to 2010 winter after record low temperatures and abundant snowfall caused disruption to much of Europe .
More dangerous thunderstorms
A consequence of the increased amounts of humid air generated by global warming is that more thunderstorms will be triggered.
 
Death by smog
A powerful combination of vehicular fumes, ground-level ozone, airborne industrial pollution and the stagnant hot air associated with heat waves, smog represents an immediate and chronic health threat to those living in built-up urban areas.
Fires and wildfires
Dry areas of land already vulnerable to wildfires are likely to be ravaged by even more frequent and destructive episodes. In 2007, more than 3,000 fires brought destruction to Southeastern Europe thanks to a long summer that created arid and parched conditions.
-Polar ice caps melting:
This raises sea levels-. If all glaciers melted today the seas would rise about 230 feet (National Snow and Ice Data Center), melting ice caps will throw the global ecosystem out of balance (alter ocean currents, which regulate temperatures), endanger several species of animals, and intensifies global warming: if the ice caps melt, the only reflector is the ocean. Darker colors absorb sunlight, further warming the Earth.
 
Loss of biodiversity and animal extinction
Loss of habitat for polar-ice edge communities such as polar bears is perhaps the most obvious consequence of having a warmer climate. Animals that are entirely dependent on cold environments will retreat to more northerly locations as the planet heats up – leading to encroachment upon other eco-systems and displacement of other animals from their natural habitat. A strong connection between oceanic warming, declines in reproduction and increases in mortality rates among seabirds, seals and sea lions has already been observed.
Death of ocean life
The world’s oceans absorb roughly 30% of all anthropogenic carbon dioxide that seeps into the atmosphere, and so inevitably, as more fossil fuels are burned, ocean life will continue to suffer the negative consequences of global warming.

Animal attacks
Animals that are driven from their natural habitats or normal migration routes by environmental factors could easily come into contact with human settlements, leading to many deaths among humans and already endangered animals.
Diminished food and water supplies
With greatly reduced rainfall, more severe droughts and loss of soil fertility, food and water supplies would soon diminish, resulting in higher prices, famine, disease, malnutrition, starvation and, ultimately, death.

Migration, conflict and wars
Countries and factions would seek to control precious, dwindling resources and provide safety and shelter for their own people – perhaps at the cost of others. Simultaneously, previously heavily populated places would become uninhabitable due to heat or other factors, displacing millions of people. Even now, relocations are taking place. Mumbai’s population is estimated to become swollen by a further 7 million people by the year 2050.
More outbreaks of deadly diseases
The Deadly Dozen is a group of 12 diseases that have been identified as those most likely to spread due to global warming. It includes Avian ‘Flu, Cholera, Plague, Ebola and Tuberculosis. Other sources of serious illnesses are exacerbated by the effects of pollution and the release of CFCs that harm the ozone layer.

Desertification
Elevation in atmospheric and ground-level temperatures is likely to aggravate soil and vegetation loss in already hot climes
Increased volcanic activity
The shifting pressures brought about by the lightening of the vast ice sheets allows the Earth’s crust to ‘bounce back’ and can cause eruptions in unexpected places – like the one experienced during Iceland's Gjálp eruption, where magma reached the surface at an unusual intermediary point between two volcanoes.


In the face of this overwhelming, international issue we can feel utterly helpless. But we can, and essentially need to establish a "green revolution". I want to be part of the new revolution.Do you?


References:
20 Deadliest Effects of Global Warming." Environmental Graffiti. Web. 11 Apr. 2012. <http://www.environmentalgraffiti.com/sciencetech/5-deadliest-effects-of-global-warming/276>.

20 Deadliest Effects of Global Warming." Environmental Graffiti. Web. 11 Apr. 2012. <http://www.environmentalgraffiti.com/sciencetech/5-deadliest-effects-of-global-warming/276>.