IPCC scientists have just ditched one of the climate establishment's favorite tools. "RCP 8.5" (the red-hot pathway used in tens of thousands of climate studies) has now been judged "implausible."
For years, this unrealistic scenario, based on extreme fossil fuel use and unrealistic population increases, fed headlines about drowned cities, crop collapse, mass death and economic ruin.
These fantasy disaster outputs then fed into policy, such as insurance warnings, school material, carbon taxes, and Net Zero infrastructure.
But now that panic pathway has been downgraded to what it always was: an extreme "what-if" exercise.
The upcoming clean-up should be brutal.
The tens of thousands of studies that sold RCP 8.5 as even possible, let alone probable, should have warning labels attached. Or better yet, have "JUNK" stamped across them.
Media stories based on them should be corrected. Financial stress tests using them should be torn up. Policy built around them should be dragged back into the real world. And the academics, editors, activists and broadcasters who spent years selling worst-case fiction as sober science should explain, publicly, why people were misled for so long.
There is a clear shift underway inside the climate establishment, and many of the true believers are starting to look around and wonder why the script is changing.