Future Earth project reveals five top risks seen by world’s top scientists. The front-line threats outlined by Nobel-prize-winning scientist Diana Liverman from the University of Arizona. Then Dr. John Wiens on a shocking study: “One-Third of Plant and Animal Species Could be Gone in 50 Years”. How many of nature’s creations will survive by 2070? It is up to us. Alex reports on the warmest winter on record and threats to world food.