About this episode
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
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