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 BBC 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 [email protected]. 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, BBC)

Despite a lot of progress in the last few decades, more than a billion people still live in acute poverty, according to the UN. Many don’t have access to basic needs like food, water, shelter and clothing. We look at an innovative project in Paraguay where people identify their own needs using a traffic light system and are then linked up with businesses, NGOs and government bodies who they work with to improve their lives.

People Fixing The World from the BBC 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 [email protected]. And please leave us a review on your chosen podcast provider.

Presenter: Myra Anubi Reporter/producer: Jane Chambers Editor: Jon Bithrey Sound mix: Annie Gardiner

(Image: Person looking at Poverty Stoplight survey, Poverty Stoplight)

How the numbers of stray dogs - and feral pigeons - can be kept down kindly in urban areas. From street dogs to feral pigeons, many towns and cities are having to deal with exploding bird and animal populations which can pose risks to health and safety. This week we take a look at ways we can control numbers in an effective and humane way. We visit a special pigeon loft in Germany, where pigeon eggs are swapped with dummy eggs to help manage the population. And we take a walk with tourists in Mexico, who are helping to socialise stray dogs while also providing funds for their care.

People Fixing The World from the BBC 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 [email protected]. And please leave us a review on your chosen podcast provider.

Presenter: Myra Anubi Producer: Claire Bates Reporters: Maddie Drury, Andre Lombard Editor: Jon Bithrey Sound mix: Andrew Mills

(Image: Layla Kudri with a couple of street dogs on a hike in Mexico, BBC)