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Heavy metals in thin film, mostly. Cadmium isn't great. They can be highly recycled though. Nevertheless, if a storm destroys a bunch of panels lots of cadmium will be dispersed

Cadmium telluride is not the prefered technology for solar cells. Silicon is still the major player, and it is free of any pollutants. I checked the wikipedia page for "solar cell". Given these informations, any consumer or technologist can adopt solar without compromising on pollutants.

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