Holiday islands burning, global temperature records smashed - are we fast reaching a point-of-no-return in the consequences of climate change? Is it still realistic to try to keep the world’s temperature increase to 1.5C? Or, as public opinion in some places shifts against curbing emissions from old cars, is the political will fading to make hard choices? Tim Lenton, founder of the Global Systems Institute and Chair in Climate Change and Earth System Science at the University of Exeter, tells Phil and Roger what’s still possible to curb the effects of global warming.

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