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Politics : The Environmentalist Thread -- Ignore unavailable to you. Want to Upgrade?

To: Maurice Winn who wrote (18695)	12/19/2007 6:38:12 PM
From: Sam	Read Replies (2) \| Respond to of 36921

When we get to 450ppm, we can start worrying about whether the trends are looking bad or not. Until then, I think CO2 being increased is a good thing, overall. You talk as though the atmosphere can be turned on a dime. A rise to around 420 is already baked in due to past emissions. CO2 lasts about 100 years in the atmosphere. Even if emissions were cut tomorrow, it would continue to rise for awhile (I'm not sure how long). Obviously the transition phase is going to happen overnight--if indeed it actually happens at all. Although no one can ascribe any individual weather event to GHG and warming, the trends are already pretty clear. Over the last 2 decades or so, wildfires have gotten more frequent and worse. Ditto for hurricanes/cyclones. Washington/Oregon just got the worst storm in their history. There has been less precipitation in the southern part of the US, both west and east, more hurricanes notwithstanding. Reservoirs are drying up due to evaporation and less rain/snowmelt. The squabble that is now going on between GA and AL/FL is nothing compared to what will come well before we get to 450ppm, IMHO, whether we get there by 2030, 2040 or 2060.