Our changing atmosphere is letting in increased sun radiation (see aerosols, ozone)
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A polluted atmosphere is a much better insulator than a clean one
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The effect? Ultimately, we might find ourselves with a decreased food supply, higher sea levels, more extreme weather, increased spread of disease, more respiratory health defects...
-Total of 28 billion barrels of petroleum
-5 billion metric tons of coal
-2.6 trillion cubic of natural gas
-The United States is responsible for about 25 percent of consumption,
-Has less than 5 percent of the world�s population.
-Two thirds of US petroleum use is for transportation.