Solar geoengineering refers to the practice of redirecting a small amount of sunlight back into space to cool the Earth. This technique is among the most controversial ones in climate research, creating serious discrepancies in the scientific community.
How Would It Work?
The best researched method involves the method of stratospheric aerosol injection—placing particles that reflect light into the high atmosphere. Another idea is marine cloud brightening.
What Are the Risks?
- Termination shock: Since this method works as a mask for temperature rise rather than reducing greenhouse gas emissions, stopping it threatens the world with an incredibly high speed rate of warming estimated by one study—is four times higher than normal.
- Unpredictable effects: As four scientists wrote in their article published in June 2026, there is no risk assessment for the regional impact of the action.
- Monsoon effect: Experts are now researching the way this technology will affect monsoons in Africa and Asia.
- Lack of control: No control measures are being developed while private companies are testing its implementation.
A Divided Community
More than 500 scientists are calling for having a global decline agreement, while the number of scientists who would like to have further research done equals 110. Certain professionals are concerned that the research may provide justification for geoengineering and deflect attention from the need to reduce greenhouse gas emissions.
Is the danger exaggerated?
This is a matter of dispute. In a study conducted in 2018, it was suggested that the risk associated with geoengineering has been blown out of proportion and can be contained. At the same time, it is emphasized that the study fails to consider the situation in which geoengineering is implemented by just one nation.
Conclusion
Solar geoengineering does not eliminate carbon dioxide; it provides a merely temporary solution to the climate change problem without resolving all the related issues.
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