Richard Betts MBE is Head of the Climate Impacts strategic area at the MET Office, the lead author on several reports from the IPCC and a Professor at the University of Exeter.

There are few areas of science as contested as the climate. I wanted to speak to someone who has been researching this area for more than 3 decades to discover out why there is so much disagreement over fundamental questions like whether the earth's warming is actually caused by humans? Can we stop it? How accurate are climate models? Should we switch to renewables? What does Richard think of Extinction Rebellion? How much are China to blame? And much more...