How Serious is Climate Change? : Documentary Lecture on Causes and Solutions for Global Warming. .\rbr\rbrTechnology to Stop Global Warming : NASA Documentary Lecture on Geoengineering and Climate Change. .\rbr\rbrClimate Change - Facts Versus Myths : Documentary Lecture on Global Warming (Full Documentary). .\rbr\rbrDesertification is a fancy word for land that is turning to desert, begins Allan Savory in this quietly powerful talk. And terrifyingly, its happening to about .\rbr\rbrFEEM Lecture by Peter Wadhams, Professor of Ocean Physics, University of Cambridge: Arctic Amplification, Climate Change, Global Warming.