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Food waste is one of the biggest environmental and economic challenges we face — and much of it happens long before the food reaches our plates. In this episode, we meet the people working to tackle the problem in different ways. We hear about the smart sensors which could help cut down waste by measuring when food has actually gone bad, rather than relying on one-size-fits-all expiry dates. And in Scotland Myra visits the start-up turning waste from whisky production into fish food.

People Fixing The World from the ÃÛÑ¿´«Ã½ is about brilliant solutions to the world's problems. We release a new edition every week for most of the year. We'd love you to let us know what you think and to hear about your own solutions. You can contact us on WhatsApp by messaging +44 8000 321721 or email peoplefixingtheworld@bbc.co.uk. And please leave us a review on your chosen podcast provider.

Presenter: Myra Anubi
Producer/reporter: Craig Langran
Editor: Jon Bithrey
Sound mix: Hal Haines

(Image: Myra Anubi with Euan Kinninmonth at the Eden Mill distillery, St Andrews, Scotland, ÃÛÑ¿´«Ã½)