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Lead–acid battery
A lead–acid battery is a rechargeable battery invented by Gaston Planté in 1860, storing energy through lead and lead dioxide plates in sulfuric acid, and used chiefly in vehicles.
Leaded petrol
Leaded petrol is gasoline containing tetraethyl lead to boost octane and suppress knock. Used from 1923, it became a major lead exposure source and was banned worldwide by 2021.
Lebăda Est Oil and Gas Field
Lebăda Est, also known as Lebada East, is an operating oil and gas field on Romania's Black Sea shelf, operated by OMV Petrom, with production since 1987.
Lebăda Vest Oil and Gas Field
Lebăda Vest (Romanian for West Swan) is an offshore oil and gas field in the Romanian Black Sea, about 95 km from Constanța, operated by OMV Petrom since 1993.
Leclanché (company)
Leclanché SA is a Swiss lithium-ion battery manufacturer founded in Yverdon-les-Bains in 1909, making cells, modules, and energy-storage systems for marine, rail, and grid uses.
Leclanché cell
The Leclanché cell is a non-rechargeable wet battery invented by French engineer Georges Leclanché in 1866, and the ancestor of the zinc–carbon dry cell used in telegraphy and electric bells.
LED lamp
An LED lamp, also known as an LED bulb, is a light fixture or replacement bulb that uses light-emitting diodes, up to 90% more efficient than incandescent bulbs.
Leduc-Woodbend Oil and Gas Field
The Leduc-Woodbend Oil and Gas Field is a light-oil and gas field in central Alberta south of Edmonton, discovered by Imperial Oil's Leduc No. 1 well on February 13, 1947.
Legacy waste
Legacy waste is hazardous and radioactive waste from nuclear weapons production and nuclear energy research since World War II and the Cold War, mostly in the United States.
Leibstadt nuclear power plant
The Leibstadt Nuclear Power Plant (Kernkraftwerk Leibstadt, KKL) is Switzerland's youngest and most powerful nuclear plant, a boiling water reactor on the High Rhine operating since 1984.
Leilongwan power station
Leilongwan power station (雷龙湾电厂), also known as Zhaoshipan power station, is a coal-fired power station in Yulin, Shaanxi, China, with two 1,000 MW ultra-supercritical units commissioned in 2018 and 2019.
Leiming Kehua / Huaibei Mining
Huaibei Mining Holdings Co., formerly Anhui Leimingkehua (雷鸣科化), is a Chinese state-controlled coal mining and coal-chemicals group in Anhui province, listed in Shanghai since 1999.
Leiyang power station
Leiyang power station is a coal-fired power station in Leiyang, Hengyang, Hunan, China, built between 1988 and 2004 with a combined capacity of 1,020 MW.
Leizhou power station
Leizhou power station (大唐雷州电厂) is a two-unit, 2,000 MW coal-fired power plant in Leizhou, Zhanjiang, Guangdong, China, owned by China Datang, with units commissioned in December 2019 and January 2020.
Lekhwair Oil and Gas Field
Lekhwair Oil and Gas Field (الخوير) is an onshore oil and gas field in northwest Oman, discovered in 1968, producing since 1976, and under waterflood since the early 1990s.
Leman gas field
The Leman gas field is a natural gas field in the Southern North Sea on the UK Continental Shelf, discovered by Shell and Esso and producing since 1968.
Lenea Oil and Gas Field
Lenea Oil and Gas Field, also spelled Lanea, is an oil field in the Bongor Basin of southwestern Chad, discovered by CNPC in 2013 and producing light crude from fractured granite basement.
Leningrad nuclear power plant
The Leningrad nuclear power plant (Ленинградская АЭС) is a Russian nuclear power station at Sosnovy Bor, Leningrad Oblast, supplying more than 55% of the electricity of St Petersburg and the region.
Leningrad-Vyborg-State Border Gas Pipeline
The Leningrad-Vyborg-State Border Gas Pipeline is a natural gas transmission pipeline in Leningrad Oblast, Russia, owned by Gazprom and running from near Saint Petersburg to the Finnish border since 1973.
Lennox generating station
Lennox Generating Station is a dual-fueled oil and natural gas peaking power station on Lake Ontario in Greater Napanee, Ontario, owned by Ontario Power Generation.
Leon-Castile (oil field)
Leon-Castile is a pair of deepwater oil fields in the Keathley Canyon area of the US Gulf of Mexico offshore Louisiana, which began producing oil in 2025.
Leonardo Rodríguez Alcaine hydroelectric plant
The Leonardo Rodríguez Alcaine hydroelectric plant, built as El Cajón, is a 750 MW hydroelectric station on the Santiago River in Nayarit, Mexico, operated by CFE since 2007.
Leste do Urucu Oil and Gas Field
Leste do Urucu is an onshore oil and gas field in the Solimões Basin near Coari, Amazonas, Brazil, discovered by Petrobras in 1987 and producing since 1992.
Lethabo power station
Lethabo power station is a 3,708 MW coal-fired power station in South Africa's northern Free State, owned by Eskom and known for burning unusually low-grade coal.
Leuna Refinery
The Leuna Refinery, TotalEnergies Raffinerie Mitteldeutschland, is an oil refinery in Leuna, Saxony-Anhalt, Germany, that can process up to 12 million tonnes of crude oil a year.
Levelized cost of electricity
The levelized cost of electricity (LCOE) is the average lifetime cost per unit of electricity generated, combining capital, fuel, financing, and operating costs into a single break-even price.
LevelTen Energy
LevelTen Energy is a Seattle-based company, founded by Bryce Smith in 2016, that operates a marketplace connecting corporate buyers with wind, solar, and storage projects through power purchase agreements.
Leviathan Gas Field
Leviathan is an offshore natural gas field in the Mediterranean Sea, discovered in 2010. It is the largest gas reservoir in Israel and began production in 2019.
Levidian LOOP
Levidian LOOP is a modular methane-splitting system by Cambridge company Levidian Nanosystems that uses microwave plasma to crack methane into graphene and hydrogen without carbon dioxide.
Lewis acid-base adduct engineering in perovskites
Lewis acid-base adduct engineering in perovskites is a materials-design strategy for perovskite solar cells in which Lewis bases or acids form coordination adducts that passivate defects and control crystallization.