Calpine Corporation, an independent wholesale power generation company, engages in the ownership and operation of natural gas-fired and geothermal power plants in North America. It generates electricity and produces steam from natural gas-fired combustion and renewable geothermal facilities. The company sells wholesale power, steam, capacity, renewable energy credits, and ancillary services to utilities, independent electric system operators, industrial and agricultural companies, retail power providers, municipalities, and power marketers. As of December 31, 2009, the company had a portfolio of 77 operating power plants with an aggregate generation capacity of approximately 24,802 megawatts. Calpine Corporation was founded in 1984 and is based in Houston, Texas.

Ozocan can meet the ozone generator and purifier needs of its water and waste water clients. Ozocan (formerly Hankin Water Technologies) provides water-purification equipment for aquaculture, commercial aquariums, drinking-water treatment, industrial-waste treatment, and other uses. The company has also supplied ozone to laminating plants to speed up the application of polyethylene to paper. Ozone systems have been used to treat drinking water for decades, in both municipal and commercial bottling plants, and have been widely used in swimming pools since the 1950s. The company was established in 1954.

DTE Energy Company, together with its subsidiaries, operates as an electric and natural gas utility company in Michigan. It also involves in non-utility operations. The company’s Energy Utility segment engages in the generation, purchase, distribution, and sale of electricity in southeastern Michigan. It generates electricity from various fuels, including coal, as well as from nuclear and hydro facilitates. As of December 31, 2009, this segment owned and operated approximately 677 distribution substations and approximately 423,600 line transformers; and supplied electricity to 2.1 million residential, commercial, and industrial customers in southeastern Michigan. The company’s Gas Utility segment engages in the purchase, storage, transmission, distribution, and sale of natural gas in Michigan. As of December 31, 2009, this segment’s distribution system included approximately 19,000 miles of distribution mains, 1,177,000 service lines, and 1,312,000 active meters. It also owned approximately 2,100 miles of transmission lines that deliver natural gas; and supplied natural gas to approximately 1.2 million residential, commercial, and industrial customers throughout Michigan, as well as to approximately 17,000 customers in Adrian, Michigan. The company’s non-utility operations include natural gas pipelines and storage; unconventional gas exploration, development, and production; power and industrial projects, and coal transportation and marketing; and energy marketing and trading operations. Its customers include electric utilities, merchant power producers, integrated steel mills, and industrial companies. DTE Energy Company was founded in 1995 and is based in Detroit, Michigan.

Hongkong Electric Holdings Limited, an investment holding company, engages in the generation, transmission, and distribution of electricity to commercial and industrial customers in Hong Kong and internationally. It holds interests in eight coal-fired units, five gas turbine units, two combined cycle units, and one wind turbine. The company also offers engineering consulting services to the electricity supply industry; and engages in advertising and financing activities. It operates in Australia, Thailand, Canada, the United Kingdom, New Zealand, and mainland China. The company was founded in 1889 and is based in Hong Kong, Hong Kong.

Sembcorp Industries can help your ship keep its shape or sell you electricity, among other things. Its 62%-held Sembcorp Marine subsidiary, the #2 offshore oil rig maker in the world, specializes in marine and offshore engineering services such as ship building and conversion, repair, and rig building. Sembcorp Utilities (also known as SembUtilities) is a leading retailer of electricity in Singapore; it also provides utility services and water management services (wastewater, reclaimed water, desalination, water for industrial use). Singapore's government (through investment company Temasek Holdings) controls 49% of Sembcorp Industries, which serves clients primarily in the Asia/Pacific region and in Europe.

Pennichuck Corporation, through its subsidiaries, engages in the collection, storage, treatment, and distribution of potable water for domestic, industrial, commercial, and fire protection service in New Hampshire and Massachusetts. The company also provides non-regulated water management services, including monitoring, maintenance, testing, and compliance reporting services for water systems of various towns, businesses, and residential communities. In addition, Pennichuck Corporation involves in real estate management and commercialization activities. The company was founded in 1852 and is headquartered in Merrimack, New Hampshire.

Dee Valley Group, operating through its Dee Valley Water unit, supplies water to more than 106,000 households and 8,250 commercial, industrial, and business customers in North East Wales and Cheshire. Dee Valley Water, formed from the combination of Wrexham Water and Chester Waterworks, supplies water to an 831-sq.-km. area. Dee Valley Water exited its nonwater operations in 2002. The company has been investing in its mains and distribution system to preventage leakage, and in 2005 it completed a 15-year water main rehabilitation program. It also commissioned a water treatment works at Pendinas. Dee Valley Group was created in 1994 as the holding company for Wrexham Water. Axa Sun Life owns 35% of the company.

Edison has grown to become Italy's leading independent power producer, with 12,100 MW of hydroelectric, fossil-fueled, and wind-powered generating capacity. Much of Edison's electricity goes to Italy's largest utility, Enel; Edison also sells power to commercial and industrial businesses. The company has a focus on natural gas exploration, production, and marketing. It also distributes gas directly to 171,900 retail customers. In 2009 Edison reported proved reserves of 35.5 billion cu. meters of natural gas equivalent. The company is controlled by Transalpina di Energia Srl (61%) and Electricite de France (19%).

Pampa Energ�a is one of Argentina's largest fully integrated electricity companies. Through subsidiaries or co-controlled companies, it generates more than 7% of the total electricity in Argentina, transmits some 95% of the country's electricity through transmission lines owned and operated by subsidiary Transener, and distributes electricity to more than 2.6 million residential and commercial customers through subsidiary Empresa Distribuidora y Comercializadora Norte (Edenor), the largest electricity distributor in Argentina. Pampa Energ�a maintains fossil fuel, thermal, and hydroelectric generation operations. Its distribution, transmission, and hydroelectric activities are regulated by Argentina's government.

CMS Energy Corporation, through its subsidiaries, operates as an energy company primarily in Michigan. It operates in three segments: Electric Utility, Gas Utility, and Enterprises. The Electric Utility segment engages in the generation, purchase, distribution, and sale of electricity. The Gas Utility segment involves in the purchase, transmission, storage, distribution, and sale of natural gas. The Enterprises segment engages in independent power production and marketing. This segment owns power generation facilities fueled mostly by natural gas and biomass. At December 31, 2009, this segment had ownership interests in independent power plants totaling 1,202 gross Megawatt. The company serves individuals and companies operating in the alternative energy, automotive, chemical, metal, food products, and various other industries. As of December 31, 2009, it served 1.8 million electric customers and 1.7 million gas customers. The company was founded in 1987 and is based in Jackson, Michigan.

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