The poll suggests the public are more ready than politicians

Most people are ready to make personal sacrifices to address climate change, according to a BBC poll of 22,000 people in 21 countries.

Four out of five people indicated they were prepared to change their lifestyle - even in the US and China, the world's two biggest emitters of carbon dioxide.

Opinion was split over tax rises on oil and coal - 44% against, 50% in favour.

Support would rise if the cash was used to boost efficiency and find new energy sources, the poll suggested.

the poll suggests that in many countries people are more willing than their governments to contemplate serious changes to their lifestyles to combat global warming.