Wahlco likes to keep it clean. It designs and manufactures air pollution control equipment, specializing in ammonia handling, flue gas conditioning, nitrogen oxide control equipment which it installs at power plants and other industrial facilities, including cement plants, oil and gas refineries, pulp and paper mills, and steel mills. Wahlco also makes products such as low-watt density heaters and specialty thermocouples for industrial applications. The company's systems and equipment can be found in more than 500 locations in more than 17 countries. Wahlco was founded by a small group of experts in 1972.

San Diego Gas & Electric (SDG&E) digs doling out energy in sandy Southern California. The company is a regulated utility that serves 1.4 million electricity customers and more than 840,000 natural gas customers in San Diego County and a portion of southern Orange County. The electric utility segment owns about 22,200 miles of power distribution lines, which serve about 25 communities; its 1,870 miles of transmission lines are managed by the California Independent System Operator. SDG&E also has limited power generation operations (it owns or contracts more than 5,500 MW of generating capacity). The gas utility operates almost 170 miles of transmission pipelines and about 8,420 miles of distribution mains.

Tenaga Nasional Berhad (TNB) keeps away malaise as it electrifies Malaysia. The largest power company in Southeast Asia, TNB generates two-thirds of the electricity on the Malaysian Peninsula. The company has a generating capacity of more than 11,940 MW; it also operates the national power transmission and distribution grid, which serves more than 7 million residential, industrial, and commercial customers. A host of subsidiaries support TNB's business; they include power equipment manufacturing, engineering, and real estate companies. Although Malaysia's power industry is undergoing deregulation, TNB has successfully resisted efforts to split up the company, which is 38%-owned by Khazanah Nasional Berhad.

Midwest Energy for their power and gas needs. The utility serves approximately 48,000 electricity customers and 42,000 natural gas customers in central and western Kansas. It also has some power generation operations; it purchases most of its electric supply from wholesale marketers. The company's Midwest United Energy subsidiary is a competitive natural gas supplier in four states, and its WestLand Energy unit sells propane to Kansas consumers; it has sold its telecommunications business. Midwest Energy was formed in 1981 when the Central Kansas Electric Cooperative acquired investor-owned Central Kansas Power.

American Electric Power Company, Inc. engages in the generation, transmission, and distribution of electric power. It generates electricity using coal and lignite, natural gas, nuclear, and hydroelectric energy. The company distributes electric power at wholesale to other electric utility companies, rural electric co-operatives, municipalities, and other market participants, as well as to retail customers in its service areas. It also operates nonregulated wind farms and barging operations, as well as provides various energy-related services. The company operates in the states of Arkansas, Indiana, Kentucky, Louisiana, Michigan, Ohio, Oklahoma, Tennessee, Texas, Virginia, and West Virginia. As of December 31, 2008, it owned or leased approximately 37,000 megawatts of power generation capacity. The company was founded in 1906 and is based in Columbus, Ohio.

Lincoln Electric System (LES) takes care of all of the power needs for residents and businesses in Lincoln, Nebraska. The company generates, purchases, transmits, and distributes electricity for approximately 128,130 residential, commercial, and industrial customers in Lincoln and surrounding communities. LES has interests in fossil-fueled power plants and wind energy facilities; the utility also purchases power through contracts with other generation utilities, such as the Nebraska Public Power District and the Western Area Power Administration, and it markets power to wholesale customers.

Natural gas supply is as natural as country and western to some Arkansans, thanks to Arkansas Western Gas. A subsidiary of Colorado-based natural gas distribution firm SourceGas, the company distributes natural gas to approximately 152,000 residential, commercial, and industrial customers in more than 90 cities and towns in northern Arkansas. Arkansas Western Gas, which operates through six regional offices across its services area also provides gas transportation services to industrial, end-use, and off-system customers, and it operates a gas storage facility.

Southern California Edison (SCE) distributes electricity to a population of more than 13 million people in central, coastal, and Southern California (excluding Los Angeles and some other cities in the regions). The utility's system consists of about 12,000 circuit miles of transmission lines and more than 113,500 circuit miles of distribution lines. SCE also has 5,500 MW of net generating capacity from interests in nuclear, hydroelectric, and fossil-fueled power plants; it sold most of its fossil-fueled facilities in response to the state's deregulation legislation. The utility sells excess power to wholesale customers. SCE is a subsidiary of Edison International.

Salamander Energy spends its day exploring and producing oil and gas. The company produces about 8,000 barrels of oil equivalent per day; Salamander Energy's proved and probable reserves total about 56 million barrels of oil equivalent. Established in 2005, the company focuses its exploration efforts in regions in Southeast Asia, including Indonesia, Thailand, Laos, and Vietnam. Salamander Energy operates from six offices in the UK and Asia. Salamander Energy plans to expand both organically and through acquisitions.

Energy and Power Solutions (EPS) would like to help. The start up company, which promises up to a 25% energy savings using its methods, makes most of its money building on-site clean energy power plants. It also sells electrical and thermal power and operates power plants on behalf of its customers. But EPS touts its xChange Point energy monitoring software as the growth engine of the future. The software tracks energy use at the device, plant, and enterprise level in real time; EPS analysts use the data to recommend energy saving changes. The company, which filed to go public in 2010, has four customers using its products at more than 60 locations.

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