Global nuclear power capacity could plunge by two-thirds over the next 20 years. Even as investment in solar and wind is surging, nuclear power has been the main source of carbon-free electricity for decades. “However, in advanced economies, nuclear power has begun to fade, with plants closing and little new investment made, just when the world requires more low-carbon electricity,” the International Energy Agency warned in a new report that takes stock of the nuclear industry. The IEA says that achieving the goals laid out in the Paris Climate Agreement “is already a huge challenge,” but without nuclear power it will be vastly more difficult. In 2018, nuclear power accounted for 10 percent of global electricity supply. But in the years ahead, nuclear is set to decline without help. In the U.S., nuclear power’s share of the electricity mix could fall from 20 percent to 8 percent by 2040. […]