Coal Pollution Reduces Global Solar Output by 5.8%, Study Finds
A recent study published in *Nature Sustainability* highlights the significant impact of coal-fired power plant pollution on global solar energy output. Researchers from the University of Oxford and University College London found that aerosols—tiny particles released from burning fossil fuels and natural sources like volcanoes—reduced global solar generation by 5.8% in 2023. This reduction equates to approximately 111 terawatt-hours of electricity, comparable to the annual output of 18 medium-sized coal plants. The effect is particularly severe in China, where aerosols cut photovoltaic output by 7.7%, with nearly a third of this decline attributed to coal-fired power plants. Other affected regions include India, the United States, and Japan. The study warns that the climate benefits of solar energy may be overestimated if pollution from coal power is not addressed. 
