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August 14, 2025 54 mins

As global temperatures continue to skyrocket, the once unthinkable is now within view: overshooting 1.5°C of warming. This limit, set out in the Paris Agreement, has defined a decade of climate action, but is fast approaching. So what happens next?


This week, Tom, Christiana and Paul grapple with the latest science, the looming risks of climate tipping points, and the urgent need to prepare for the worst - even while hoping and working for the best. They’re joined by Ricken Patel, former Founding CEO of global activism nonprofit Avaaz, who is now calling us to take the possibility of overshoot seriously, and to build the political, technological and social capacity to bring temperatures back down.


From nature-based solutions to novel carbon dioxide removal and solar radiation management, this episode considers the broad spectrum of options on the table, and the challenges they present. Why has climate contingency planning been missing from the political debate? And does simply talking about it risk slowing climate action?


These aren’t just questions of what we might do in the future - but of what we’re prepared to act on now.


Learn more 


🌡️ Explore the IPCC’s Special Report on Global Warming of 1.5°C - outlining some of the projected impacts and available pathways 


🌱 Interested in nature-based solutions? Check out this explainer from the UN Environment Programme


🌬️ Interested in carbon dioxide removal? Browse through the CDR Primer 


☀️ Interested in solar radiation management? Read this NOAA factsheet


🎧 Listen to two of producer Ben’s other podcasts about carbon dioxide removal, The Carbon Removal Show and Grounded: A Climate Startup Journey


🎤 Leave us your voice notes and questions for upcoming episodes on SpeakPipe



Follow us on social media for behind the scenes moments and to watch our videos:


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Producer: Ben Weaver-Hincks

Video Producer: Caitlin Hanrahan

Assistant Producer: Caillin McDaid

Assistant Producer: Eve Jones

Exec Producer: Ellie Clifford

Commissioning Editor: Sarah Thomas 


This is a Persephonica production for Global Optimism and is part of the Acast Creator Network.


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