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People Fixing the World
The concrete cleaners
People Fixing the World
Aug 20, 2019

Concrete is the most used man-made product in the world but it comes with a heavy environmental price. Between 5% and 7% of the world's annual carbon emissions come from producing the cement that glues concrete together. Most of these climate-changing gases are released when a vital ingredient, limestone, is melted down in the manufacturing process. But one company has devised a new type of cement that only solidifies when you pump carbon dioxide into it. The gas becomes locked in as it turns to concrete. This is similar to the way carbon dioxide has been stored in rocks by nature over millions of years. As Nick Holland reports, it's one of the solutions the industry could use to mitigate its impact on the environment.

(Photo Credit: BBC)

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Making life easier for older people

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)


23min 13sec

The concrete cleaners

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