Global Scans · Geoengineering · Weekly Summary

A global catastrophic risk is a hypothetical future event that has the potential to damage human well-being on a global scale. Some events could cripple or destroy modern civilization. Any event that could cause human extinction is known as an existential risk.

• How the IPCC and other authoritative bodies could responsibly assess the opportunities, limitations and risks of solar geoengineering would itself arguably be a form of governance, one that remains underexplored. PubMed Central (PMC)
• Scientists, in a separate research project in the U.K., are testing the geoengineering process in a three-story cloud chamber, with the potential for a real world test in 2028. The Week

Last updated: 24 June 2026