The growing desert
Allan Savory has dedicated his life to studying management of grasslands. And if that doesn't sound exciting, just wait, because it touches on the deepest roots of climate change and the future of the planet.
"The most massive, tsunami, perfect storm is bearing down on us," is the grim beginning to Savory's talk. This storm is the result of rising population, of land that is turning to desert, and, of course, climate change.