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Sunday, Aug 9, 2026

Are there enough minerals for solar power expansion to help mitigate climate change?

Sue Bin Park, Skeptical Science
yes

Global mineral supplies are large enough to support solar development for climate change mitigation.

A 2023 analysis of 75 emissions-reduction scenarios found that projected median mineral demand largely remains within known geological resources. Projected median demand for silver was about 68,000 metric tons, compared to 530,000 tons of estimated reserves; cadmium demand was 38,000 tons against 500,000 tons of reserves.

Tellurium may constrain cadmium-telluride panels, a minority of the global solar market, but research suggests improved refining and material efficiency could substantially reduce this strain.

Recycling can further reduce demand for newly mined minerals by recovering silver, copper, silicon, and other components for reuse in future panels. Recent innovations are improving recycling cost-effectiveness, while federal programs continue to support domestic mineral supply chains and recycling research. 

The main challenge lies in expanding production and supply chains, not mineral shortages.

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