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)

Being in hospital can be frightening and lonely for children — but playful ideas are helping make the experience a little easier. In Scotland, professionally trained clowns are visiting paediatric wards to bring joy and distraction, while in the US, immersive video games are helping young patients come to terms with illness and long stays. We meet the people using creative ways to brighten up a stay in hospital for children and teenagers.

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 US reporter: Scott Miles Producers: Craig Langran, Richard Kenny Editor: Jon Bithrey Sound mix: Annie Gardiner

(Image: Clown Doctors Dr Biscuit and Dr Groovy with presenter Myra Anubi, BBC)

Barcelona in Spain is famous for its beautiful streets, lined with tall apartment buildings. But the architecture is a problem for many people who have lived for years in upstairs apartments but who now find the stairs unmanageable.

In 2008, a survey found that in one district there were 300 people who could not leave their homes alone. A group of volunteers decided to do something about this and got hold of a special wheelchair with caterpillar tracks, so it can be used to take people up and down stairs. After an initial pilot scheme they launched a local service called “Let's Go Down to the Street”, to help elderly residents go shopping or meet up with friends. Sixteen years on, the service is offered across the city.

Plus we visit a home for senior citizens in an unlikely location: a university campus. The Mirabella complex at Arizona State University in the US offers its residents the chance to sample the college lifestyle – from lectures to shows and sports fixtures.

People Fixing The World from the BBC is about brilliant solutions to the world's problems. 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.

We first podcast this episode in February 2024.

Presenter: Myra Anubi Producer: William Kremer Reporters: Esperanza Escribano, Anthony Wallace Series Producer: Jon Bithrey Editor: Penny Murphy Sound mix: Gareth Jones

(Image: Barcelona resident Teresa being helped down the stairs, BBC)