Cooling Credits for Solar Geoengineering

Make Sunsets claims to offset warming by releasing sulfur dioxide in the stratosphere and sells 'cooling credits' to finance launches. This privatizes a planetary‑scale intervention, shifting climate action from state-led mitigation to unilateral services that are hard to measure and regulate. — It forces a debate over whether markets and startups should be allowed to deploy geoengineering and sell credits for unverified global externalities.

Sources

Scientists Seek To Turbocharge a Natural Process That Cools the Earth

BeauHD 2025.10.10 45% relevant

Both pieces describe marketized climate interventions that sell credits for planetary effects outside traditional mitigation—Make Sunsets’ 'cooling credits' via aerosols and Terradot’s carbon removal credits via rock weathering—raising parallel questions about verification, governance, and legitimacy.

Andrew Song: Global Cooling with Sulfur Dioxide in the Stratosphere — Manifold #91

Steve Hsu 2025.07.31 100% relevant

Andrew Song describes Make Sunsets’ SO2 balloon launches and its 'cooling credits' business model in the interview.