Scientists raise fresh concerns over controversial plan to dim the Sun

Scientists have warned that efforts to artificially reduce the amount of sunlight reaching Earth could carry greater risks than previously believed, despite being explored as a possible way to slow global warming.

The approach, known as solar geoengineering or solar radiation modification, involves reflecting a portion of the Sun’s rays back into space by releasing reflective particles into the upper atmosphere.

Researchers say new studies suggest the technique could disrupt global weather patterns, alter rainfall, intensify droughts in some regions and increase the risk of extreme climate events elsewhere.

Experts also warned that uneven deployment of the technology by a single country or group of countries could create geopolitical tensions, as the climate effects would not be shared equally across the world.

Another concern is that once such a programme begins, it may need to continue for decades. Abruptly stopping it without first reducing greenhouse gas emissions could trigger a rapid rise in global temperatures, a phenomenon known as “termination shock.”

Scientists stressed that solar geoengineering does not address the root cause of climate change by reducing greenhouse gas emissions. Instead, they said it should not be viewed as a substitute for cutting fossil fuel use and transitioning to cleaner sources of energy.

While research into the technology continues, experts are calling for stronger international oversight before any large-scale deployment is considered.