But if third world countries can't practice subsistence agriculture, where do they get their food to subsist on? I'm not sure how that works, but I agree it is a big problem. Surely our industrial scale, mechanised western agriculture is an even bigger problem?
I do agree with the principles that the biggest carbon sources should be looked at first, and those where we can get the most bang for our buck. So you don't think that CO2 is just plant food and that AGW is a scam, Scipio?