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Many cities are becoming unpleasant to live in: they are getting hotter due to climate change and all the heat absorbed by the streets and buildings. But Stuttgart in Germany has been tackling this by carefully studying local wind patterns. Using the natural airflow they are cooling the city by creating corridors of wind from the surrounding hills.  It’s an idea which is being copied by cities around the world such as Singapore. There we see how new buildings are being designed to allow a breeze to flow despite the continued development. People Fixing The World from the ÃÛÑ¿´«Ã½ is about brilliant solutions to the world's problems. We release a new edition every Tuesday. 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: Richard Kenny Singapore reporter: Tessa Wong With thanks to: Indrawan Prabaharyaka Editor: Jon Bithrey Sound mix: Hal Haines (Image: Richard Hassell of WOHA architects in the Punggol Digital district of Singapore, ÃÛÑ¿´«Ã½)