This week: Kené Umeasiegbu, head of environment at Tesco talks about how food retailers can tackle environmental challenges in supply chains, and the benefits of using science-based targets.

Plus: mass reforestation and climate change, $1bn green bond for Brazilian soy farmers, more waste returned to Australia, UK LPG switch to biofuels, and the world’s 2bn tonnes of municipal waste problem, in the news digest.

Hosted by Ian Welsh

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