The matter of a clean energy future

A clean energy transition will create jobs, promote energy independence, improve public health, and, ultimately, mitigate climate change. But getting to this new future will require more than just phasing out fossil fuels. The production of a wide range of energy-relevant materials-lithium, cobalt, and nickel for batteries; rare earth elements for wind turbines and electric motors; silicon for solar panels; and copper to expand the electric grid-must be scaled up substantially. Mobilizing these materials without reproducing the environmental harms and social inequities of the fossil fuel status quo poses an urgent challenge.