Allan Savory, thinking out-of-the-box, promotes livestock as the answer to desertification and climate change. "There is only one option left to climatologists and scientists, and that is to do the unthinkable: to use livestock, bunched and moving, as a proxy for former herds and predators, and to mimic nature".
 
It goes counter to traditional thinking, of course, but hear his talk and see what you think.