The naturalist Sir David Attenborough has said climate change is humanity’s greatest threat in thousands of years.
The broadcaster said it could lead to the collapse of civilisations and the extinction of “much of the natural world”.
He was speaking at the opening ceremony of United Nations-sponsored climate talks in Katowice, Poland.
The meeting is the most critical on climate change since the 2015 Paris agreement.
The naturalist is taking up the “People’s Seat” at the conference, called COP24. He is supposed to act as a link between the public and policy-makers at the meeting.