Tao Xiangli gets out of his homemade submarine after operating it in a lake on the outskirts of Beijing September 3, 2009. Amateur inventor Tao, 34, made a fully functional submarine, which has a periscope, depth control tanks, electric motors, manometer, and two propellers, from old oil barrels and tools which he bought at a second-hand market. He took 2 years to invent and test the submarine which costs 30,000 yuan ($4,385). (Photo by Christina Hu/Reuters)

Attendees look at Volkswagen's BUDD-e, a long distance electric vehicle, displayed during a press event at CES 2016 at The Chelsea at The Cosmopolitan of Las Vegas on January 5, 2016 in Las Vegas, Nevada. CES, the world's largest annual consumer technology trade show, runs from January 6-9 and is expected to feature 3,600 exhibitors showing off their latest products and services to more than 150,000 attendees. (Photo by David Becker/Getty Images)

A general view shows the Krasnoyarsk hydro-electric power station on the Yenisei River near the Siberian city of Krasnoyarsk, Russia, January 13, 2016. The power plant, owned by EuroSibEnergo company, part of En+ Group, with a generating capacity of 6,000 megawatt (MW), has a ferro-concrete dam 124-metres high and 1065-metres long and is the second largest Russian hydroelectric power station. About 85% of the energy generated is intended for the Rusal Krasnoyarsk aluminium smelter, according to representatives of the power station. (Photo by Ilya Naymushin/Reuters)

Sabrina Crespo da Silva removes electrical tape from a client at her Sabrina Bronze rooftop salon, where she offers the service of taping on bikini tops which create crisp tan lines, in the Turano favela of Rio de Janeiro, Brazil, Thursday, January 27, 2022. Even though beaches reopened amid the COVID-19 pandemic, some clients using Sabrina's rooftop service say they are still anxious about returning to the crowded seashore and potentially catching the virus. (Photo by Silvia Izquierdo/AP Photo)

Workers prepare the roof of a house to get installed solar power modules for producing heat on October 15, 2011 in Wessling, Germany. Germany has and is continuing to invest heavily in solar energy, both in the public and private sectors. The German government introduced a feed-in tariff with its Renewable Energy Act in 2000 that guarantees homeowners a minimum rate for selling electricity from renewable energy sources into the nation's electricity grid. (Photo by Alexandra Beier/Getty Images)

Electric cars sit charging in a parking garage at the University of California, Irvine January 26, 2015. “The Irvine Smart Grid Demonstration”, a $79 million project funded half by federal stimulus money and half by Edison and partners like UC Irvine, was launched in 2010. The $12 billion utility's research team Southern California Edison is testing everything from charging electronic vehicles via cell phone to devices that smooth out the power created by rooftop solar panels. Those are some of the roughly 60 projects in the works at Edison's Advanced Technology division. It has a small $19 million annual budget, but its influence far exceeds that. (Photo by Lucy Nicholson/Reuters)

Men ride a motorcycle carrying a fan in Havana, Cuba, Thursday, April 6, 2023. As Cuban citizens deal with the country´s many problems like electricity blackouts, empty stores and long lines for almost any service, they also have to manage with the lack of public transportation as there is a shortage of working buses and few privately owned vehicles. (Photo by Ramon Espinosa/AP Photo)

A handout photo made available by Jose Juan Rodriguez Rocha, on 17 November 2021 shows lightning over Cumbre vieja Volcano as seen from El Paso, La Palma, Canary Islands Spain, 14 November 2021. The lightning over a volcano is sometimes seen due to the charge of electricity caused by the friction of the expelled particles within the column of ashes and pyroclastic rocks. (Photo by Jose Juan Rodríguez Rocha/EPA/EFE)