This April, the international scientific committee that designs climate scenarios for the United Nations did something it should have done a decade ago. It officially retired SSP5–8.5 — the corollary to the infamous RCP 8.5 — declaring the scenario “implausible” and removing it from the framework that will underpin the next IPCC assessment.For more than fifteen years, that scenario powered nearly every terrifying climate headline you have ever read: vanishing coastlines, uninhabitable cities, mass extinction, civilization collapse. It is also what millions of American schoolchildren were taught as the future — not as a remote stress test, but as established fact.It was never the future. And the people who kept saying it was knew better.
THE PLANET IS STILL DOING GREAT. IT’S THE CLIMATE CULT THAT’S BROKEN
RCP 8.5 was designed in 2011 not as a forecast but as a 90th-percentile worst-case stress test, built on assumptions its own modelers admitted were extreme: 12 billion people on Earth by 2100, technology effectively frozen in place, and a fivefold global increase in coal use that exceeded what geologists believe can even be mined. Scientists began warning it was implausible in 2017. A landmark 2020 paper in Nature said it “becomes increasingly implausible with every passing year.” Former President Joe Biden’s EPA quietly pulled it from regulatory analysis in 2022 — concluding it fell outside the 1st-to-99th-percentile range of plausible futures.
