I don't think I have that much need for precision. But it would be good to have at least some analysis of the costs of an additional 0.5 degree increase, given

I don't think I have that much need for precision. But it would be good to have at least some analysis of the costs of an additional 0.5 degree increase, given that limiting climate change is one of the biggest global efforts right now, and the costs of that effort. And maybe that analysis exists, but if so I haven't seen it. We shouldn't be having these big global efforts without clearly explaining to the public exactly why it is worth the investment over other things we could be investing in to improve global health. If there is a good chance food production will drop significantly with the additional 0.5 degree, it probably makes sense to invest a lot to meet the goal of 1.5 vs 2.0. If the main concern is flooding and a smaller drop in food production, it might make more sense to invest in more intensive farming (we are certainly nowhere near the ceiling of easy gains here) and better infrastructure.