After decades of scientific study and political wrangling the world has agreed—at least on paper—that 1.5C of heating must be the upper limit of our impact on the climate system. How could something that sounds so small matter so much?

This is Threshold Season 4: “Time to 1.5.” In this episode, we take you inside the scientific and political origin story of 1.5C, from the holocene to the halls of COP26 in Glasgow. 

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This giving season listening matters. To keep making our show, Threshold needs to raise $75,000 by the end of the year — and we’re over 85% of the way there!

Threshold is listener-funded.To keep making this work and sharing it with audiences for free, we have to raise $75,000 by the end of the year — and we’re over 80% of the way there! If you haven’t chipped in yet, consider making a gift today.