 Cutting off precipitation altogether, and the precipitation does follow as toxics to our forests, have become carbon sources as well, instead of carbon sinks. Of course, obviously, we have contributed radically to this buildup of CO2 in the atmosphere, which has triggered other gases, methane, nitrous oxide, about the methane release. I'm not talking about cow flatulence. I'm talking about thawing and releasing methane deposits from the Arctic tundra and seafloor. Please search Siberian methane craters. You will be shocked at the images.