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Climate change increases global farmland area and agricultural emissions, study finds
(drawdown.org)
Farmers require 88 million hectares more land to grow current levels of food than they would have absent global warming
In a study published [recently] in Nature Geoscience, an international team of researchers from the University of Minnesota, Project Drawdown, and several other institutions elucidate and quantify a worrying climate feedback loop in which global warming hampers crop efficiency, leading to more land use for comparable amounts of food, which then releases yet more greenhouse gas emissions.
archived (Wayback Machine):
Food and agriculture account for around one-quarter of global greenhouse gas emissions, primarily due to land use.
If "agriculture" in this context includes raising and killing animals, then it's actually much more than that.
