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.

Environmental Waste Controls (EWC) slows down the fill-up of UK landfills. The company leases and sells waste-compactor equipment and provides maintenance services for the compactors. It also collects, transports, and recycles or disposes of waste for its 400-plus public- and private-sector customers, which include manufacturing and retail companies, food processors, hotels (such as Hilton and Radisson Hotels), railway stations, National Health Service Trusts, and local governments. The company was the subject of a management buyout in 2004. EWC was founded in 1993.

Portland General Electric (PGE) keeps many Birkenstock-shod feet warm: The company, formerly a subsidiary of Enron, generates, purchases, and distributes electricity to about 815,750 customers in Oregon. PGE's service territory covers 52 cities, including Portland and Salem. Its hydroelectric, coal-fired, and gas-fired plants had a generating capacity of more than 2,600 MW in 2009, and it purchased another 1,920 MW of generating capacity. PGE also markets wholesale electricity and natural gas to other utilities and marketers in the western US. In keeping with the "green" image of Portland residents, PGE leads the nation in residential customers who purchase power from renewable sources.

Empresa Energetica de Mato Grosso Sul, or Enersul, brings electricity to the farmers and ranchers of Brazil's state of Mato Grosso do Sul. Cattle ranching and other crop cultivation (sugarcane, wheat, soybeans) are the region's main industries and the company's biggest customers. Enersul distributes 1.4 million megawatts of electricity to about 640,000 residential, industrial, and commercial customers via more than 70 municipalities across the state. It generates a small percentage of its power but most comes from Eletrosul parent ELETROBRAS and other sources. Enersul is owned by Energias do Brasil, which is controlled by EDP - - Energias de Portugal.

Alabama Power powers up Southern Rockers and others in the heart of Dixie. The Southern Company subsidiary provides electricity to nearly 1.4 million residential and business customers in Alabama. The utility operates more than 91,000 miles of transmission and distribution lines, and it has nuclear, hydroelectric, and fossil-fueled power plant interests that give it a generating capacity of more than 12,200 MW. Alabama Power sells wholesale power to more than 15 municipal and rural distribution utilities; it also provides steam transmission (used for heating and cooling buildings) in downtown Birmingham, Alabama, and sells electric appliances (such as thermostats, ovens, and washing machines)

Operations at Toho Gas are solid enough to make it Japan's third-largest gas company after Tokyo Gas and Osaka Gas. Toho Gas provides 3.9 billion cubic meters of natural gas to 2.3 million-plus customers in the Tokai region of Japan. Toho Gas also provides about 434,000 tons of liquefied petroleum gas to about 290,000 customers. Boasting a 26,000-km pipeline network, Toho Gas imports natural gas primarily from Indonesia, Australia, Malaysia, and Qatar. TOHO GAS CO. additionally sells gas appliances, constructs gas pipes, and off its beaten path, paves and repairs roads.

PNM Resources, Inc. company's primary utility unit, Public Service Company of New Mexico, distributes electricity to nearly 500,000 residential, commercial, and industrial customers in the state. PNM Resources operates power plants with more than 2,700 MW of generating capacity and markets energy to wholesale customers in the western US. Its Texas-New Mexico Power Company (TNMP) unit provides transmission and distribution services at regulated rates to about retail electricity providers that, in turn, provide retail electric service to 230,000 end users. Subsidiary First Choice Power is a retail electric provider operating in Texas and serving 234,000 customers.

China Power International Development Limited (China Power) is one of five national power generating groups that construct and operate large power plants in China. The company is a subsidiary of CPI Holding, and is ultimately controlled by China Power Investment Group (CPI Group). China Power owns five high-capacity coal-fired power plants, including the Pingwei Power Plant and the Yaomeng Power Plant. It also has stakes in power plants in Changshu and Shanghai. The company has an installed capacity of more than 9,000 MW. China Power also manages three other power plants, which have a total installed capacity of about 1,300 MW.

Nicor Inc., through its subsidiaries, engages in natural gas distribution business in the United States. Nicor Inc. distributes natural gas to approximately 2.2 million residential, commercial, and industrial customers in northern Illinois. It also provides natural gas storage and transmission-related services to marketers and other gas distribution companies. The company’s gas distribution, transmission, and storage network includes approximately 34,000 miles of steel, plastic, and cast iron main; approximately 2.0 million steel, plastic/aluminum composite, plastic, and copper services connecting the mains to customers’ premises; and 8 underground storage fields. In addition, Nicor offers shipping services, including the transportation of containerized freight between Florida, the eastern coast of Canada, the Bahamas, and the Caribbean region. It transports building materials, and food and other necessities for developers, manufacturers, and residents in the Caribbean and the Bahamas; tourist-related shipments intended for use in hotels and resorts, and on cruise ships; and interisland shipments and northbound shipments of apparel and agricultural products, as well as provides inland transportation and cargo insurance services. As of December 31, 2009, the company operated a fleet of 11 owned vessels and 4 chartered vessels with a container capacity totaling approximately 5,270 Twenty-foot equivalent units. Further, it owns and/or leases containers, container-handling equipment, chassis, and other equipment. Additionally, Nicor involves in the marketing of energy-related products and services, including warranty and maintenance contracts, as well as repair and installation services of heating, air conditioning and indoor air-quality equipment, and customer move connection services for other utilities; and wholesale marketing of natural gas supply services. Nicor Inc. was founded in 1953 and is based in Naperville, Illinois.

Cobb Electric Membership Corporation (Cobb EMC) makes sure that Cobb County, Georgia residents can cook corn on the cob (and anything else) using electric power and natural gas. The utility distributes electricity to about 196,000 residential, commercial, and industrial customers in Cobb County and four other north metro Atlanta counties. Cobb EMC operates about 10,400 miles of power lines. Its Cobb Energy Management unit is a for-profit affiliate that provides administrative and labor services to Cobb EMC and offers phone, Internet, and natural gas options for Cobb EMC's customers primarily through subsidiaries.

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