Biosphere

Сезон 1, серия 1: On 16 July 1945, the first nuclear test exploded over the New Mexico desert. This was the birth of man-made existential threats. We are now more at risk from our own technology than any natural extinction event. This fascinating science documentary looks at these human derived threats to existence, such as nuclear war and climate change. What can be done to avoid these dangers? Or is it too late?