Sir David Attenborough addresses world leaders at COP26

British naturalist Sir David Attenborough has urged COP26 climate summit delegates to "turn tragedy into triumph" and tackle climate change.

The world is now about 1.2C warmer than it was in the 19th Century - and extreme weather events like heatwaves, floods and forest fires are already becoming more intense.

Sir David spoke for seven minutes alongside screens showing a graph that tracked the rise of carbon concentration in the Earth's atmosphere.

That number - which Sir David said was "the clearest way to chart" the story of humanity - currently sits at close to 414 parts per million. According to the Greenhouse Gas Bulletin, that is now 149% of the pre-industrial level.

To watch the Sir David's full 7 minute address click on the video below

Click below to watch a 1 minute summarized clip of Sir David's address