A Perfect Planet: Humans

David Attenborough narrates a look at the effect human activity is having, revealing how the carbon dioxide being produced is destabilising life on Earth. There is footage of rescued orphaned elephants in Kenya, victims of ever-worsening droughts, while ocean patrols off the coast of Gabon fight to save endangered sharks. In the Amazon, wildlife teams are saving animals in the shrinking rainforest, and in San Diego a zoo is freezing the DNA of endangered species before they go extinct