Unformatted text preview: US supply is imported. Arctic National Wildlife Refuge: USGS estimates total reserves at 10 to 16 billion bbls; may be as little as 3.5 billion bbls (2 year maximum supply at current use). Present global oil burning yields about 5.8 billion tonnes* of carbon dioxide emissions per year (by 2020 this will increase to about 9.8 billion tonnes). COAL Total Reserves: World 10 trillion tonnes; US 290 billion tonnes (about 30% of all reserves; actual total may be 10X this amount); most is unmined; 250 to 300 year supply at projected use. *bbl = barrel = 42 gallons; tonnes = metric tonnes...
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- Spring '08
- Global Warming, total reserves