[ghastmaster]

I find it hard to reconcile that the entire world is going to be going through cycles of drought and flooding over and over due to a moderate increase in temperature and co2. Where in earth's history is the basis for this? We have had far higher temperature and co2 levels during periods of great animal and plant growth.

[polotics]

Well with more CO2 you have more convection, the higher atmosphere is actually cooling because of the nice CO2 blanket that keeps heat trapped lower. (Which by the way prooves that it's not the sun's natural variability that's the cause, otherwise the higher atmosphere would also get warmer) This temperature differential between low and high atmosphere then means more convection, more evaporation, more movement of air and water. Look just read up on this ok, it's not that hard.

[namaria]

Previous temperature changes occurred over millennia, not a century and a half.

Human civilization and agriculture depend on a very narrow range of conditions.

[ghastmaster]

So the levels aren't the problem, it's the rapidity?

> Human civilization and agriculture depend on a very narrow range of conditions.

I'm in Ohio, USA. Are you from the Arctic by any chance? Maybe Australia? How about Mongolia? Perhaps Brazil? Mozambique? We live and thrive in all of those unique areas. Very narrow conditions indeed...