Solar power production undercut by coal pollution
Coal is by far the most polluting fuel that we use. It produces the most carbon emissions per unit of energy, and impurities in the coal produce a lot of sulfur dioxide aerosols, as well as nitrous and nitrogen oxides. Then there’s the coal ash that’s left behind, which typically contains a lot of toxic metals. The health benefits of displacing coal power are typically estimated to be well above the costs of the new generating equipment.
But a new study suggests that the problems with coal-derived pollution go beyond health; it interferes with other power sources. Researchers have found that aerosols, both natural and human-derived, significantly reduce the power we could be getting from solar panels, to the tune of hundreds of terawatts a year. And a lot of those aerosols come from burning coal.
A big impact
The new work, done by a team in the UK, is based on a new global inventory of solar facilities. This started with known inventories of solar facilities, and was supplemented with AI-analyzed satellite imagery and crowdsourced records of locations. Satellite images were then used to determine the size of these facilities, and location-tagged weather data could then be used to estimate their power production.
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