World leaders meeting in Cornwall are to adopt strict measures on coal-fired power stations as part of the battle against climate change.

The G7 group will promise to move away from coal plants, unless they have technology to capture carbon emissions.

The coal announcement came from the White House, which said it was the first time the leaders of wealthy nations had committed to keeping the projected global temperature rise to 1.5C.

Coal is the world's dirtiest major fuel and ending its use is seen as a major step by environmentalists, but they also want guarantees rich countries will deliver on previous promises to help poorer nations cope with climate change.

The G7 will end the funding of new coal generation in developing countries and offer up to £2bn ($2.8bn)to stop using the fuel.

A video message from Sir David Attenborough was played to world leaders in Cornwall on Sunday as they set out their plans for meeting emissions targets.

Speaking beforehand, Sir David said: "The natural world today is greatly diminished...

This is known as climate change or global warming.

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