tag:blogger.com,1999:blog-6603657364208326095.post6885693412056510597..comments2013-09-11T20:32:39.181+10:00Comments on planet doom?: Brazil and the future of the Amazon rain forestCLhttp://www.blogger.com/profile/03802647723644727654noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-6603657364208326095.post-39245263193949725542008-06-19T13:51:00.000+10:002008-06-19T13:51:00.000+10:00This is certainly an interesting hypothesis, altho...<I><BR/>This is certainly an interesting hypothesis, although there are a few quibbles (e.g. The CO2 increase is exaggerated; CO2 has not gone up 44% in less than 80 years...)<BR/></I><BR/>Re-read the tree-hugger article:<BR/><I><BR/>Our emission of the hundreds of billions of tonnes of CO2 from burning of fossil fuels has filled our and the bees atmosphere with a concentration of CO2 40% higher than in the previous century.<BR/></I><BR/><BR/>So, the time frame is not 80 years - it's 100 years. Nonetheless ...<BR/>Present levels are about 385, and 1900 levels about 295. 385/295 is about 1.31 - so 40% is still too much.<BR/><BR/>However, 385/275 is 1.4 - and 275 ppm is one of the most commonly used figures for preindustrial co2 levels (about 250 years ago). So I think the person at treehugger got 'a century ago' confused with 'pre-industrial'.llewellyhttps://www.blogger.com/profile/16001213921499191213noreply@blogger.com