Scientists conducted the first outdoor test in the United States of technology aimed at brightening clouds to reflect sunlight and temporarily cool the planet. This test, conducted on a decommissioned aircraft carrier in San Francisco Bay, involved spraying aerosol particles into the air to see if they could consistently reach the right size. If successful, the next stage would involve targeting clouds above the Earth’s oceans. The goal of this technology is to counteract global warming by deflecting some of the sun’s rays. However, the idea of deliberately intervening in climate systems is contentious, with critics concerned about potential unforeseen consequences. Despite skepticism, interest and funding for research into climate intervention technologies are growing, driven by increasing global temperatures and the urgency to address climate change. The recent test marks a significant step in understanding the feasibility and potential impacts of marine cloud brightening as a method of climate intervention.

https://www.nytimes.com/2024/04/02/climate/global-warming-clouds-solar-geoengineering.html