Electric power generation

Jim Freeman tries to saw through thick ice slabs on his property in Fremont, Neb., Thursday, March 14, 2019, after the ice-covered Platte River flooded it's banks. Evacuations forced by flooding have occurred in several eastern Nebraska communities. (AP Photo/Nati Harnik)

FILE - In this March 16, 2011, file photo, steam escapes from Exelon Corp.'s nuclear plant in Byron, Ill. The nuclear power industry is pushing the Nuclear Regulatory Commission to cut back on inspections at nuclear power plants and throttle back what it tells the public about plant problems. (AP Photo/Robert Ray, File)

Youths carry empty containers which they'll use to collect water, during rolling blackouts affecting the water pumps in people's homes and apartment buildings, in Caracas, Venezuela, Sunday, March 10, 2019. Venezuelans reached new levels of desperation Sunday as the country’s worst blackouts took their toll, gathering in larger numbers than usual at springs in the mountains of Caracas to collect water and scrounging for scarce cash to pay for food in the few shops that were open. (AP Photo/Eduardo Verdugo)

A man wearing a mask rides a bicycle along the Han river in Seoul, South Korea, Wednesday, March 6, 2019. South Korean President Moon Jae-in has proposed a joint project with China to use artificial rain to clean the air in Seoul, where an acute increase in pollution has caused alarm. (AP Photo/Lee Jin-man)

In this March 1, 2019 photo, Washington Gov. Jay Inslee stands on an outdoor patio as he takes part in media interviews in Seattle the day he announced that he will seek the 2020 Democratic presidential nomination. Inslee kicked off his campaign with a call for making the fight against climate change the "first, foremost and paramount duty" of the United States. (AP Photo/Ted S. Warren)

FILE - In this Feb. 1, 2017 file photo, National Security Adviser Michael Flynn speaks during the daily news briefing at the White House, in Washington. The Democrat-led House oversight committee launched an investigation Tuesday into whether senior officials in President Donald Trump’s White House worked to transfer nuclear power technology to Saudi Arabia as part of a deal that would financially benefit prominent Trump supporters. The proposal was pushed by former National Security Adviser Michael Flynn, who was fired in early 2017, but it has remained under consideration by the Trump administration despite concerns from Democrats and Republicans that Saudi Arabia could develop nuclear weapons if the U.S. technology was transferred without proper safeguards. (AP Photo/Carolyn Kaster)

People watching the fall of a chimney during the blasting of a former coal-fired power station in Dortmund, Germany, Sunday, Feb. 17, 2019. (AP Photo/Martin Meissner)