REC Solar helps you say "So long!" to fossil fuel dependence. The company designs and installs solar electric systems for residential and small commercial customers in six states -- Arizona, California, Colorado, Hawaii, New Jersey, and Oregon. REC Solar has installed more than 3,200 power systems since being founded in 1997. Its systems range from simple rooftop panel displays for residential customers to industrial solar electric systems for Costco. REC Solar uses solar panels manufactured by Kyocera, Mitsubishi, Sanyo, and Sharp, and components by Satcon, SMA Solar Technology, and Xantrex. Investment group Mainstream Energy owns both REC Solar and AEE Solar.

American Water Works Company, Inc. provides water and wastewater services to residential, commercial, and industrial customers in the United States and Canada. As of December 31, 2009, the company served approximately 16 million people with drinking water, wastewater, and other water-related services in 35 states and two Canadian provinces. It owned approximately 80 surface water treatment plants, 600 groundwater treatment plants, 1,200 groundwater wells, 50 wastewater treatment facilities, 1,200 treated water storage facilities, 1,200 pumping stations and 100 dams, and 49,000 miles of mains and collection pipes. American Water Works Company also enters into public/private partnerships, including operation and maintenance contracts; and design, build, and operate contracts for the provision of services to water and wastewater facilities for municipalities and the United States military. In addition, the company designs, builds, and operates smaller-scale water and wastewater treatment plants for real estate developers, industrial companies, and new or expanding communities; and provides services to domestic homeowners to protect against the cost of repairing broken or leaking pipes inside and outside their homes. Further, it provides granular activated carbon for water purification, and involves in the management and disposal of biosolids and wastewater by-products for municipal and industrial customers. The company was founded in 1886 and is based in Voorhees, New Jersey.

FERSA Energias Renovables has found being green isn't too difficult. The Spanish holding company invests in and operates companies that produce electricity utilizing such renewable energy resources as wind power, solar energy, and biomass. The company's holdings span the European continent with investments in wind farms in Spain, Estonia, and Italy as well as holdings in Panama, India, and China. Holdings include Eolica el Pedregoso, Elolica de Pino, Parque Eolico Hinojal, Enrilews, and OU Est Wind Power. The company also has holdings in solar power and biomass operations in Spain through Invetem Mediterranea and Gestora Fotovoltaica de Castellon.

Constellation Energy Group, Inc., through its subsidiaries, supplies energy products and services in North America. The company operates in three segments: Merchant Energy, Regulated Electric, and Regulated Gas. The Merchant Energy segment owns, operates, and maintains fossil, nuclear, and renewable generating facilities, and holds interests in nuclear generating facilities, qualifying facilities, and power projects. It also provides operation and maintenance services, including testing and start-up, to owners of electric generating facilities. In addition, this segment offers products and services to meet the energy requirements of wholesale and retail customers, including distribution utilities, cooperatives, aggregators, and commercial, industrial, and governmental customers. As of December 31, 2009, it had a total generation capacity of 7,118 megawatts. The Regulated Electric segment purchases, transmits, distributes, and sells electricity in central Maryland. It maintained approximately 240 substations, 1,300 circuit miles of transmission lines, and 24,500 circuit miles of distribution lines. The Regulated Gas segment purchases, transports, and sells natural gas in central Maryland. Constellation Energy Group also designs, constructs, and operates renewable energy, heating, cooling, and cogeneration facilities; offers energy performance contracting and energy efficiency engineering services; provides home improvements, service electric and gas appliances, service heating, air conditioning, plumbing, electrical, and indoor air quality systems, as well as offers natural gas marketing to residential customers in central Maryland; and develops and deploys new nuclear plants in North America through its joint venture. The company was founded in 1906 and is based in Baltimore, Maryland.

Integrys Energy Group, Inc., through its subsidiaries, operates as a regulated electric and natural gas utility company in the United States and Canada. It provides natural gas utility services in Chicago, Wisconsin, Michigan, and Minnesota. As of December 31, 2009, Integrys Energy Group, Inc. served approximately 1,669,000 residential, commercial and industrial, transportation, and other customers. It had approximately 22,000 miles of natural gas distribution mains; and approximately 1,010 miles of natural gas transmission mains. The company also generates and distributes electric energy form coal, natural gas, fuel oil, hydroelectric, and wind resources in Wisconsin and Michigan. It served approximately 489,000 residential, commercial and industrial, wholesale, and other customers. In addition, Integrys Energy offers nonregulated energy supply and services; and electric transmission services. Integrys Energy Group, Inc. was formerly known as WPS Resources Corporation and changed its name to Integrys Energy Group, Inc. in February 2007. Integrys Energy Group, Inc. was founded in 1883 and is based in Chicago, Illinois.

Central Vermont Public Service Corporation, together with its subsidiaries, operates as an electric utility company. The company engages in the purchase, production, transmission, distribution, and sale of electricity. It sells electricity to residential, commercial, and industrial customers. As of December 31, 2009, the company served approximately 159,000 retail customers in Vermont. Its wholly owned plants included 20 hydroelectric generating facilities with an aggregate nameplate capacity of 45.3 megawatts; and 2 oil-fired gas turbines with a combined nameplate capacity of 26.5 megawatts. The company also owns, buys, sells, and leases real and personal property and interests therein related to the utility business; and sells and rents electric water heaters in Vermont and New Hampshire. In addition, it has joint ownership interests in electric generating and transmission facilities. The company was founded in 1929 and is based in Rutland, Vermont.

Piedmont Municipal Power Agency (Piedmont Power) generates, purchases, and transmits wholesale electricity on behalf of its 10 member municipal utilities, which distribute the power to nearly 95,000 retail customers in northwestern South Carolina. These ten utilities serve the cities of Abbeville, Clinton, Easley, Gaffney, Greer, Laurens, Newberry, Rock Hill, Union, and Westminster. Piedmont Power was created to buy an ownership interest in the Catawba Nuclear Station in York County, South Carolina, in order to secure a reliable source of electric generation for its member utilities.The agency currently owns a 25% stake in the Catawba plant.

Hokkaido Electric Power Co. (HEPCO) distributes electricity to almost 3.9 million residential, commercial, and industrial customers on the northernmost Japanese island, Hokkaido. The company operates more than 46,760 miles of transmission and distribution lines, and it owns thermal, hydroelectric, and nuclear power plants (including the No. 1 and No. 2 reactors at Tomari Power Station). HEPCO also purchases and markets wholesale energy; other operations include engineering and construction, energy consulting, electrical appliance sales, telecommunications, information technology, and utility-related services. New businesses include medical imaging systems and realty. The company was founded in 1951.

CHOICE! Energy Services and Texas Energy Services divisions the company provides consulting and price comparison services to retail customers. CHOICE! Energy Services also provides commodity brokerage and consulting services to energy producers and marketers, utilities, banks, and other corporations. Customers include BP and Morgan Stanley. President and CEO Javier Loya formed CHOICE! Energy in 1994.

Zodiac Marine and Pool (formerly Polaris Pool Systems) wants your backyard retreat to be sparkly clean, and your maritime sector to have access to the best in liferafts and inflatable boats. The swimming pool and spa maintenance division manufactures a wide range of automatic pool cleaners, automated chlorinators, and related accessories. The marine division makes inlflatable boats for recreational use and for the military, as well as a toilets, grease separators, marine incinerators, and other environmental equipment for the marine sector. Zodiac Marine and Pool, a Carlyle Group company, has operations throughout the US, as well as in Australia and in Europe.

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