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?

Our friends at Threshold have thoughtfully explored these questions. They are a Peabody Award-winning podcast about what it means to be alive at a time of extraordinary planetary change, and today we’re sharing an episode from their latest season “Time to 1.5”.

This episode takes you inside the scientific and political origin story of 1.5C, from the holocene to the halls of COP26 in Glasgow.

Listen to the full season and learn more at thresholdpodcast.org.