Guardian: George Monbiot (Theres a population crisis all right. But probably not the one youre thinking of, 20 November) is right to point out the devastating impacts of expanding livestock operations around the world. Yet, in dismissing the relationship between human population and climate, he contravenes the IPCCs November 2014 report for policymakers, which states Anthropogenic greenhouse gas emissions have increased since the pre-industrial era, driven largely by economic and population growth, and...