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 ...