24 October 2025

Politico: "Global cooling startup raises $60M to test sun-reflecting technology"

by Corbin Hiar and Karl Mathiesen

“They have convinced Silicon Valley [venture capitalists] to give them a lot of money, and I would say that they shouldn’t have,” said Gernot Wagner, a climate economist at Columbia Business School and author of the book “Geoengineering: The Gamble.” “I don’t think it is a reasonable path to suggest that there’s going to be somebody — the U.S. government, another government, whoever — who buys Stardust, buys the [intellectual property] for a billion bucks [and] makes the VC investors gazillions. I don’t think that is, at all, reasonable.”

Quoted in: "Global cooling startup raises $60M to test sun-reflecting technology" by Corbin Hiar and Karl Mathiesen, Politico (24 October 2025).

Co-production as an Economically Feasible Pathway to Economy-Wide Electrification

by Cody E. Finke, Theodore G. Albertson, Ian McKay, Aravindh Rajan, Eric McFarland, Annelise Gill-Wiehl, Daniel M. Kammen, and Gernot Wagner

10 Sep 25

Early Investment in Decarbonization Can Help Save Trillions in Climate Costs

A net-zero world by 2100 is likely inevitable, but the next decade will be critical for securing a livable future.

10 Sep 25

Getting to Greener Steel

Coalbed methane is an underappreciated problem of global steel production. While cutting methane emissions in the steel supply chain will not produce green steel overnight, it could reduce the sector’s emissions by the equivalent of a billion tons of carbon annually, and at little cost.

25 Sep 25