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Politics : The Environmentalist Thread

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To: Wharf Rat who wrote (9313)	2/5/2007 6:12:10 PM
From: T L Comiskey	Read Replies (1) of 36917

3. The Earth (and its carbon cycle) is too big for humans to affect it. While the Earth exchanges a great deal of carbon between the ocean, atmosphere, soil, and biosphere, it is the net balance which is of greatest concern to us. Without human influence, this regulatory process produces a net carbon increase of 0.0 Gt/year. During 1850-2000, through a combination of fossil fuel burning, cement manufacturing, and land-use changes, humans added a net 174 Gt of carbon. This caused the majority of an increase from 288 ppm (parts per million) to 369.5 ppm of CO2. As mentioned above, we currently add 8 Gt/year to the atmosphere. Wharf.. Tim Flannery says in.. The Weather Makers.. that we added 23 Gts of C02 to the atmosphere in 2003 any clue as to why the discrepancy..? thx Tim edit.. Its possible that engineer was only referring to Americans emitting 8 Gts that would be approx 30% of the 23+Gts..

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