define bad
okay so there's a limit to how hot co2 can heat the earth. is this bad? well it depends on how you define bad. frozen tundra will become fertile farmland. at the same time, other areas become desert. best guess is it's a small net percentage loss. whew. won't affect us rich folks in the us much. a 1% reduction in available calories is no big deal. might even be good for us to cut down to some 2673 daily calories. however, that same reduction will push some 60 million people from marginal to starving. which would be a disaster hundreds of times larger than the asian tsunami. everybody panic. or not. means we need to grow food more efficiently. which is what we've been doing for uh basically ever.