Electric power generation

FILE- In this Oct. 6, 2015, file photo, Superintendent Jackie Ratliff, a coal miner, holds coal running through a processing plant in Welch, W.Va. A federal report says Americans are using less coal this year than at any time since Jimmy Carter's presidency _ despite the Trump administration's efforts to revive the country's coal industry. Energy Secretary Rick Perry on Tuesday urged development of Appalachian coal country’s natural gas and petrochemical sectors. (AP Photo/David Goldman, File)

A demonstrator holds a placard which reads 'climate first, politics second' during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. The climate change conference, COP24, will take place in Poland from Dec. 2-14. (AP Photo/Geert Vanden Wijngaert)

FILE - In this file photo taken Tuesday, Feb. 28, 2017, a passenger airliner flies past steam and white smoke emitted from China Huaneng Group's Beijing power plant that was the last coal-fired plant to shut down on March 18, 2017 as the Chinese capital convert to clean energy like thermal power. (AP Photo/Andy Wong, File)

French President Emmanuel Macron leaves after delivering a speech on 'The presentation of the strategy for ecology transition', at the Elysee Palace in Paris, Tuesday, Nov. 27 2018. Macron said the government will find a way to delay tax increases on fuel during periods when world oil prices are rising. The move aims to reproduce the situation that has led to protests in recent days, some of which have become violent and even marred the famed Champs-Elysees avenue in central Paris. Behind reads: Change together. (Ian Langsdon, Pool via AP)

U. S. Energy Secretary Rick Perry addresses media during a press conference at the government headquarters in Prague, Czech Republic, Wednesday, Nov. 14, 2018. (AP Photo/Petr David Josek)

In this Saturday, Nov. 10, 2018 photo, visitors tour the Iranian wing of the Baghdad International Fair, in Baghdad, Iraq. Iran, already feeling the bite of U.S. sanctions, is turning to its neighbor Iraq to soak up some of its exports in agriculture, manufacturing and energy. At the Baghdad International Fair, Iran's ambassador says he wants to triple trade with Iraq. (AP Photo/Karim Kadim)

Saudi Arabia's top prosecutor Saud al-Mojeb walks to board a plane to leave Turkey, in Istanbul, Wednesday, Oct. 31, 2018. A top Turkish prosecutor said Wednesday that Saudi journalist Jamal Khashoggi was strangled as soon as he entered the Saudi Consulate in Istanbul as part of a premeditated killing, and that his body was dismembered before being disposed of. A statement from chief Istanbul prosecutor Irfan Fidan's office also said that discussions with Saudi chief prosecutor Saud al-Mojeb have yielded no "concrete results" despite "good-willed efforts" by Turkey to uncover the truth. (DHA via AP)

FILE: In this file photo from Tuesday, May 9, 2017, signs are posted by the Hanford Nuclear Reservation in Richland, Wash. Officials have ordered some workers at a sprawling Washington state nuclear waste site to go inside and stay there because steam has emerged from a tunnel filled with waste that was being filled with cement. The U.S. Department of Energy says in a statement Friday that there is no indication that the steam seen at the Hanford Nuclear Reservation contains radiation or any other hazardous material and that the workers were ordered inside as a precaution. (AP Photo/Manuel Valdes)

Russian President Vladimir Putin, left, and Uzbek President Shavkat Mirziyoyev shake hands during their meeting in Tashkent, Uzbekistan, on Friday, Oct. 19, 2018. Putin arrived in Uzbekistan on Friday for an official visit. (Alexei Nikolsky, Sputnik, Kremlin Pool Photo via AP)