Why we need to reduce our methane emissions

Rising methane levels in the atmosphere are a large contributor to climate change, but because the gas breaks down relatively quickly, reducing our methane output would rapidly have an effect, says Professor Andrea Sella (UCL Chemistry).

Listen: BBC Radio 4’s ‘The World Tonight’ (from 40 mins 25 secs), More: BBC World Service’s ‘Newshour’ (from 14 mins 37 secs)