Microsoft co-founder Bill Gates has financially supported scientific research exploring ways to reduce global warming by reflecting a portion of sunlight away from Earth. The proposed approach, known as solar geoengineering, has attracted attention and raised concerns among climate scientists and environmental experts.
One proposed technique involves releasing tiny reflective particles into the stratosphere to reflect some sunlight back into space. This could potentially lower global temperatures and reduce some effects of climate change.
Gates has previously donated to Harvard University’s Solar Geoengineering Research Program, which supported research into a project called the Stratospheric Controlled Perturbation Experiment (SCoPEx). Scientists planned to investigate the effects and risks of releasing small amounts of calcium carbonate particles into the atmosphere.
However, the research has faced criticism over possible environmental consequences. Experts warn that altering the amount of sunlight reaching Earth could affect rainfall, regional weather patterns, agriculture and ecosystems.
Another concern is that countries or organisations might rely on artificial cooling instead of reducing greenhouse gas emissions. Scientists also warn that suddenly stopping a large-scale geoengineering programme could cause temperatures to rise rapidly.
The proposed Harvard SCoPEx experiment was eventually abandoned in March 2024. It is important to note that Gates supported research into the technology rather than personally launching a plan to block the Sun.
Solar geoengineering remains a controversial area of climate research, with scientists continuing to debate its potential benefits, environmental risks and the need for international oversight.
