Archive · 27 Jul 2025
Billionaire-Backed Plan to Dim Sunlight Sparks Controversy
Imagine scientists trying to cool the Earth by making clouds that reflect sunlight.
A team, funded by wealthy people, wanted to spray saltwater over the ocean to create these clouds.
They planned a big experiment, but the first small test got stopped quickly.
Some people worry this could mess up the weather and harm nature if it stops suddenly.
Others think we need to study these ideas to find ways to deal with climate change.
This idea is called solar geoengineering, and it's causing a lot of debate.
Researchers planned a large-scale experiment to dim sunlight by spraying saltwater over the ocean.
The project, backed by billionaire donors, aimed to create clouds over an area larger than Puerto Rico.
The initial test in Alameda, CA was halted after 20 minutes due to lack of local community engagement.
Solar geoengineering aims to reflect sunlight away from Earth, but faces criticism and controversy.
Critics warn of potential disruptions to weather patterns and the risk of "termination shock."
- Who
- Researchers from the University of Washington's Marine Cloud Brightening Program, funded by billionaire donors.
- What
- A team of researchers planned a large-scale experiment to dim sunlight by spraying saltwater to create clouds.
- When
- The project was planned, with a small initial test in 2024.
- Where
- The experiment was planned off the west coasts of North America, Chile or south-central Africa.
- Why
- To explore methods of solar geoengineering as a potential solution to global warming.
Concerns and Opposition
Support and Exploration
Risks and Effects
Concerns and Opposition
Potential disruption of weather patterns, harm to wildlife, and risk of "termination shock".
Support and Exploration
Further research into solar geoengineering is needed to understand its effectiveness and risks.
Transparency and Engagement
Concerns and Opposition
Some scientists and local communities express strong concerns about local impact and safety.
Support and Exploration
Lack of community engagement and transparency in the planning and execution of experiments.
- Project Goal
- Dim sunlight to reduce global warming
- Technique
- Spraying saltwater aerosols over oceans
- Initial Test Location
- Alameda, California
- Initial Test Duration
- 20 minutes
- Area of Planned Clouds
- Larger than Puerto Rico
- Funding Sources
- Quadrature Climate Foundation, SilverLining, various donors