There’s a plan to make cold things hot – and hot things cold – using the lost rivers that wind under cities like London. Sounds like magic? Is magic. SCIENCE MAGIC.

Just how *do* we warm ourselves up in winter without knackering the planet? Or should we just put a few more jumpers on and shiver? And what on Earth have we found in this pub’s basement?

We investigate with Alice Bell from 10:10 and Louise Waters from Scene.

Sustainababble is your friendly environment podcast, out weekly. Theme music by the legendary Dicky Moore – @dickymoo. Sustainababble logo by the splendid Arthur Stovell.

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