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> the big problem with solar power is its disposal too
Yes, some types of PV panels on abandoned solar farms have contaminated ground with cadmium.
https://www.instituteforenergyresearch.org/renewable/solar/the-mounting-solar-panel-waste-problem/
But it's not a disaster or reason to cancel all PV projects, stupid people contaminate environment with stuff all the time and we just need to deal with it.