"We have 1.4 trillion barrels of oil, enough to last at least 200 years. We have 2.7 quadrillion cubic feet of natural gas, enough to last 120 years. We have 486 billion tons of coal, enough to last more than 450 years—and we need to use more of this strategic resource cleanly and wisely here at home while selling it around the world."
Burning that amount of fossil fuel would generate 444 billion metric tons of carbon dioxide from the oil, 135 billion tons from the natural gas, and 1.258 trillion tons from the coal. To maintain a climate compatible with civilization all of humanity needs to limit future greenhouse pollution to less than 650 billion tons."
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