The Damocles World: Professor Raymond Pierrehumbert on the Dangers of Solar Geoengineering

In this ClimateGenn episode I am speaking with Professor Raymond Pierrehumbert, who is the Halley Professor of Physics at the University of Oxford about solar geoengineering. He and Professor Michael E. Mann from Pennsylvania University coauthored an article in The Guardian on the 12th March 2025 titled:

‘The UK’s gamble on solar geoengineering is like using aspirin for cancer’.

"We shouldn't be actively creating harm. And the first line of defence is to actually not at least have governments and philanthropy funding these outdoor experimentations."

Professor Pierrehumbert

Here we delve deeper into Ray’s overt objections to the UK’s Advanced Research & Invention Agency (ARIA). ARIA is the UK’s version of the mysterious US Defence Advanced Projects Agency (DARPA). ARIA has recently allocated £45mn British Pounds to fund solar geoengineering projects including outdoor experiments.