20:32DiscoveryEarthshot 3 - The prize winnersBBC World Service Duration: 27 minutes Mon 18th Oct 2021, 20:32 on BBC World Service West and Central AfricaAvailable for over a yearListen nowFive categories, a million pounds in each. Who has won the Earthshot prize? Show more GenresFactualScience & NatureFormatsMagazines & ReviewsBrandDiscovery Source: BBC Online