Industrial waste can make rudimentary batteries. That's likely no good in electric cars etc, but could be ideal for stashing away vast surpluses of renewable power.
Smartphones, electric vehicles and wind turbines rely on environmentally destructive rare earth mining operations. Harnessing electric fields could make this mining more sustainable
Countries have pledged to phase out HFC-23, a powerful greenhouse gas, but atmospheric data shows that emissions are five times higher than governments are reporting
A US facility will pull up to 500,000 tonnes of carbon dioxide from the air per year after it opens in 2025 and sell carbon offset credits to large companies