The US’s largest water reservoir, Lake Mead at the Hoover Dam, is in very, very bad shape. How bad is it? New satellite images from NASA show just how…
Some countries are already making use of this potential. Since 2000, 36 dams in the US have been retrofitted with turbines, adding more than 500 megawatts of…
It didn’t need to be this way. This spring, as people lined up for newly available, miraculously effective Covid-19 vaccines, it was easy to imagine a direct…