Is planet Earth getting greener?

Canadian psychologist and culture war commentator Jordan Peterson says planet Earth has got 20% greener in the last 20 years.

But satellite data tells a different story.

We investigate the correct number, with the help of Dr Chi Chen, from Rutgers University in the US.

Presenter: Kate Lamble Series producer: Tom Colls Production co-ordinator: Brenda Brown Sound mix: Giles Aspen Editor: Richard Fenton-Smith