The more important cutoffs are, as usual, based on water availability for agriculture and consumption. Really bad negative impact at near 2 C. Problems in Medi

The more important cutoffs are, as usual, based on water availability for agriculture and consumption. Really bad negative impact at near 2 C. Problems in Mediterranean area, most China and India, and southern USA. On the other hand, floods in Scandinavia. Ecological damage is not even funny at 1 C which is about where we are now, with accelerated desertification and serious water availability problems in Africa and Middle East. (Also no more evaporative cooling due to lack of water.) Every 1 C averaged is about 5% sharper water cycle. That's not counting the potential for runaway heating due to activation of putative hydrocarbon sources in permafrost or under glaciers.