Yes, I'm using UN numbers, as they have the best track record. Looking at past projections the population was typically slightly below the estimated figure, so

Yes, I'm using UN numbers, as they have the best track record. Looking at past projections the population was typically slightly below the estimated figure, so the most likely scenario is that this will be the case here as well. In any case I don't think that devastation will come to pass, as China's emissions pretty much plateaued already and India's are looking like they did as well. The west has been in decline in that regard for years now. It's going to get worse - that's a given - but with the recent estimates giving a more precise number for emissions connected with land use change, global CO2 emissions might have plateaued, or even peaked a few years ago already.