Climate Uncertainty: The Coolest Year for the Rest of Our Lives? with Zeke Hausfather

The El Niño now building in the tropical Pacific is unlike anything in the historical record, and it's arriving on top of decades of warming. Together, they could push global temperatures to roughly 1.8°C (3.2ºF) above pre-industrial levels next year, offering a preview of what may become the new normal within a decade. As the rate of warming continues to accelerate and public attention swings between alarm and fatigue, how can we clearly understand where the planet is actually headed and what it will take to adapt? In this episode, Nate is joined by climate scientist Zeke Hausfather to break down the numbers and metrics within climate science, and translate what they will actually feel like for humanity. He explains how global temperature is measured, what the new generation of IPCC scenarios reveals about plausible futures, and why there's still uncertainty in just how much warmer we'll get by the year 2100. Zeke also unpacks how declining aerosol pollution has sped up warming and other climate variables that have actively emerging research behind them. While certain amounts of warming are locked in, he emphasizes that there is still a wide difference between every degree of warming, and the actions we take now will determine climate futures for centuries to come. How does the IPCC attempt to incorporate the most unpredictable factor for climate models – human behavior – and what do their current projections estimate? If we reached zero emissions tomorrow, would the planet cool back down, or are we locked into the warming we already have? And in a world growing weary of crisis headlines, how can we hold the reality of climate change without tipping into denial or despair? (Conversation recorded on September 16th, 2026) About Zeke Hausfather: Zeke is a lead author of the IPCC Seventh Assessment Report, and was a contributing author to the Sixth Assessment Report. He also authored the climate trends chapter of the Fifth U.S. National Climate Assessment, and has testified as an expert witness before the U.S. House Committee on Science, Space, and Technology. At Berkeley Earth, Zeke helps produce one of the world's primary global surface temperature records. He is also a Climate Science Contributor at Carbon Brief. At Stripe, Zeke leads climate research for Frontier, a $2 billion advance market commitment accelerating permanent carbon removal. Show Notes and More Watch this video episode on YouTube Want to learn the broad overview of The Great Simplification in 30 minutes? Watch our Animated Movie. --- Support The Institute for the Study of Energy and Our Future Join our Substack newsletter Join our Hylo channel and connect with other listeners