Re:Cycles (Score 1)

a) you reveal your ignorance of agriculture. suffice to say, land isn't arable simply because of air temperatures. b) there is much evidence to the contrary. many common crop plants, in the face of higher temperatures or higher CO2 amounts, lose their agricultural usefulness. among the problems: -become toxic -don't grow -become more easily infested by pests

I have one critique here. Plant growth is increased by CO2 concentration, all else being equal. Dunno if you have access to journals, but there's data in the free part of this paper:

the growth stimulation of 156 plant species was found to be on average 37% http://link.springer.com/artic...

There's one recent study which was heavily publicized that found that CO2 concentration plus nitrogen level changes plus temperature changes (basically trying to fully replicate predicted post-warming conditions) decreased plantgrowth, and the headlines were frequently something like "High carbon dioxide levels can retard plant growth" http://news.stanford.edu/pr/02...

Headlines like that are bullshit; simulated post-warming environments can retard plant growth, not CO2 levels alone.