Humans have been changing the climate for longer than we’ve been farming. We killed off the mammoths, which turned the tundra from grasslands into taiga covered in tiny low growth forest and dramatically reduced the albedo of lots of Northern Eurasia. Humans prefer grassland over forest which is part of why eucalyptus are so prevalent in Australia, they do better with fire than other trees. It has been posited that the Little Ice Age was because when 95% of the American population died there was a great deal less land management and deliberate forest fires, resulting in more than two centuries of above average carbon sequestration and a drop in temperatures.
Humans have been changing the climate for a long time.
Humans have been changing the climate for a long time.