President Trump has repealed a key government scientific finding that carbon emissions endanger human health. The so-called “endangerment finding” of 2009 was the legal bedrock of efforts to rein in emissions and critics fear it is a major setback in the fight against climate change.

Also on the programme: Sir Jim Ratcliffe has apologised for "offending some people" with his language after saying the UK had been "colonised by immigrants". We discuss the importance of the language we use in politics.

And as the Berlin Film Festival opens, we speak to the director of one of the entrants, a rom-com set in Kabul.