Green Blog: Jim Laurie figures hes heard the solution to climate change: bring on the cows. Or sheep. Or just about any grazing animals. Laurie is a proponent of a method of restoring exhausted land that is causing a stirif not yet an avalancheof interest among ranchers, farmers and environmentalists. It involves bringing livestock onto spent and unproductive land for a short tour of munchingmaybe a day, a few days, or a week. If theres not enough to eat, bring feed to them, he says. What the animals...