From the archives, an urgent case. The planet is sending signals: melting ice, wilder storms and shifting seasons. Can we crack this one before it’s too late?

Dan and Michael start with the basics. Channel 4 News weather presenter Liam Dutton explains the difference between weather and climate, why greenhouse gases trap heat, and what almost twenty years of forecasting has shown him about records being broken.

Then it’s on to the solutions, and some are stranger than you’d expect. Author Nicola Penfold makes the case for whale poo as a climate hero, Cindy Forde of Planetari describes solar panels printed onto windows and mangroves that lock away more carbon than rainforests, and young campaigners Amy and Ella Meek and Bella Lack explain where to start when a problem feels far too big.