He was actually unfairly charitable be looking at global figures. Unfortunately, the "meat problem" is largely Africa, India, and China. Yes, about 20% of US meat comes from those regions because it is cheaper. But it is entirely sustainable for countries like the US, one of the largest meat consumers, to produce all the meat we consume and stay well within reasonable greenhouse gas footprints.

Your reply to him unfaortunately made the same mistakes his statements did. If you laser-focus at the countries where most vegans are pushing to make changes, it takes bad-faith analysis of figures to see the meat industry as anything but entirely sustainable.

People who want meat-eating to stop have an agenda. People who want to farm meat have an agenda. You have to look through TWO agendas, not just one, to find the real answers.