Legendary broadcaster Sir David Attenborough spoke to the United Nations Security Council yesterday, reminding world leaders that "climate change is the biggest threat to security that modern humans have ever faced".

Photo by John Cairns (Source: Wikimedia Commons)

"I don't envy you the responsibility," he went on "that this places on all of you and your governments."

David Attenborough is of course best known as the narrator of BBC wildlife documentaries like Planet Earth, but in recent years he has been dedicating more and more of his time to raising awareness of the dire consequences of climate change.