Reuters Pictures: Energy

General view of wind energy plants in the offshore energy park Alpha Ventus in the North Sea, about 45 kilometres (27 miles) north of the island of Borkum April 26, 2010. The Alpha Ventus wind farm with 12 ‘5-Megawatt-class’ wind energy turbines, will start its production on Tuesday, April 27, 2010. REUTERS/Christian Charisius (GERMANY – Tags: ENERGY ENVIRONMENT)

Solar powered lights are pictured along the Hoernli ridge on the Matterhorn in Zermatt, Switzerland, July 13, 2015. Zermatt celebrates the first ascent of the Matterhorn on the Hoernli ridge made by Briton Edward Whymper on July 14, 1865, with 6 other roped team members. The red light (4th from top) marks where on their descent four men fell to their death on the North face. All mountaineering activities will be banned on July 14 on the Swiss and Italian side of the Alpine summit in remembrance of the more the 500 people who died trying its summit. REUTERS/Denis Balibouse TPX IMAGES OF THE DAY

Solar panels are pictured at a solar plant near Santiago, Chile May 5, 2017. Picture taken May 5, 2017. REUTERS/Ivan Alvarado

Steam rises from the cooling towers of the Electricite de France (EDF) nuclear power station at Nogent-Sur-Seine, France, November 13, 2015. The nuclear industry argues world leaders at the COP21 conference in Paris next week should not have to choose between nuclear and renewables but between low-carbon energy, including nuclear, and fossil fuels. Paris will host the World Climate Change Conference 2015 (COP21) from November 30 to December 11. Picture taken November 13, 2015. REUTERS/Charles Platiau

A general view shows solar panels to produce renewable energy at the photovoltaic park in Les Mees, in the department of Alpes-de-Haute-Provence, southern France March 31, 2015. The solar farm of the Colle des Mees, the biggest in France, consists of 112,780 solar modules covering an area of 200 hectares of land and representing 100 MW of power. REUTERS/Jean-Paul Pelissier

Vivint Solar technicians install solar panels on the roof of a house in Mission Viejo, California October 25, 2013. REUTERS/Mario Anzuoni (UNITED STATES – Tags: ENERGY)

Steam rises from a coal power plant of RWE, one of Europe’s biggest electricity companies in Neurath, north-west of Cologne, Germany, November 10, 2017. Picture taken November 10, 2017. REUTERS/Wolfgang Rattay

A woman boils water in a kettle using solar energy panels at a village of Pengyang county, Ningxia Hui Autonomous Region, December 4, 2007. China wants rich economies to back a fund to speed the spread of greenhouse gas-cutting technology in poor nations as it seeks to persuade delegates at global warming talks the focus of responsibility belongs on the West. Picture taken December 4, 2007. REUTERS/Stringer (CHINA) CHINA OUT

A worker sets up an electric grid at the Coc 6 open-cast coal mine in Cam Pha town, in Vietnam’s northeast Quang Ninh province, 200 km (124 miles) from Hanoi September 20, 2010. Vietnam will need to import 3 million to 15 million tonnes of coal a year by 2015, rising to 21 million to 40 million annually by 2020, as new coal-fired power plants are built, Tran Xuan Hoa, chief executive of state mining firm Vinacomin said. Meanwhile, the Southeast Asian country, which is the world’s top anthracite exporter, will gradually cut coal exports to 3-5 million tonnes per year, predominantly for metallurgy, a trade ministry official said. REUTERS/Kham (VIETNAM – Tags: ENERGY BUSINESS)

High tension transformers are seen next to solar panels used to produce renewable energy at the photovoltaic park during its official inauguration in Cestas, southwestern France, December 1, 2015. The solar farm of Cestas, the biggest in Europe, consists of 1 Million solar modules covering an area of 2,5 km2 of land and representing 300 MW of power. REUTERS/Regis Duvignau

A wind power system made from plastic buckets is seen on boats at a floating village in Hanoi, Vietnam June 29, 2016. Picture taken on June 29, 2016, REUTERS/Kham

A wind turbine is seen over the panels of a solar power plant of Korea South East Power Co. (KOSEP) in Incheon, in this file photo taken September 30, 2010. REUTERS/Jo Yong-Hak/File Photo

A parking structure at the University of California San Diego uses innovative solar trees to collect renewable energy from the Sun February 8, 2011. Each “Solar Tree” will generate more than 17,000 hours of clean energy per year, enough to power more than four single family homes and avoids 13.2 metric tons of carbon emissions. California aims to slow climate change by putting a price on carbon — a low, low starting price. The program is the last, keystone step in a controversial half-decade push to green the state’s business for the good of the planet and the economy. Picture taken February 8, 2011. To match Special Report CARBON-CALIFORNIA/ REUTERS/Mike Blake (UNITED STATES – Tags: ENERGY ENVIRONMENT)

Wind turbines are pictured at Swisswinds farm, Europe’s highest wind farm at 2500m, before the topping out ceremony near the Nufenen Path in Gries, Switzerland September 30, 2016. REUTERS/Denis Balibouse

Heliostat mirrors reflect the sky in a field at the construction site of a 240 meter (787 feet) solar-power tower in Israel’s southern Negev Desert, February 8, 2016. The world’s tallest solar-power tower is being built off a highway in the Negev Desert in southern Israel, its backers hoping the technology will gain a foothold in the solar market even if it remains a small player for now. Picture taken February 8, 2016. REUTERS/Amir Cohen

A worker of Puerto Rico’s Electric Power Authority (PREPA) repairs part of the electrical grid after Hurricane Maria hit the area in September, in Manati, Puerto Rico October 30, 2017. REUTERS/Alvin Baez