The Fisher Stevens documentary on climate change "Before the Flood" follows actor Leonardo DiCaprio as he interviews individuals from every facet of society in both developing and developed nations who provide unique, impassioned and pragmatic views on what must be done today and in the future to prevent catastrophic disruption of life on our planet.

“We cannot afford, at this critical moment in time, to have leaders in office that do not believe in the modern science of climate change,” said Leonardo di Caprio. "We need to galvanize the world community to put in office people who are not only believers in the science but are going to take rapid action immediately.”

The film was issued before the American elections in an attempt to influence the result and rumour says it may not be around for long -  watch Before the Flood here.