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table of greenhouse gas concentrations from the U.S. Department…

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This document displays data on important greenhouse gases and their concentrations as of October 2000.

AI caption December 2010 · Photo 644 of 708

The Important Greenhouse Gases (except water vapor) ['.S. De artment of Enerov, (October 2000 (1) Pre- Man- . (all concentrations expressed in pans - _~ Natural Total (ppb) PEICCIII OI . . . 111dust11a1 . . made p61 btlllon) . addmons . . Total basehne addmons Carbon Dioxide (C02) 288.000 68.520 ll 11.880 368.400 l Methane (CH4) , 577 |[ 320 1.745 | Nitrous Oxide (N20) 285 El 15 312 | Misc. gases ( CFC'S. etc.) 25 W] 2 27 || Total 289.158 69.109 || 12.217 370.484'1000090

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