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At least a third of food grown around the world fails to be eaten, with the resulting food waste causing 10 per cent of global carbon emissions.

However, there are pioneers trying to tackle different issues along the chain.

We visit a project linking farmers direct to customers in Puerto Rico, check out smart labels that extend the shelf life of food by revealing when food actually goes off, and revisit an app where millions of people share spare food for free.

Presenter: Myra Anubi
Reporter/Producer: Jo Mathys
Reporter/Producer: Claire Bates
Producer in Puerto Rico: Adriana De Jesus
Producer: Richard Kenny
Series producer: Tom Colls
Sound mix: Hal Haines
Editor: Penny Murphy

Image: Crystal D铆az