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.

South Carolina Electric & Gas (SCE&G) is a regulated utility with 659,000 electricity and 313,000 natural gas customers in the Palmetto State. The utility, a subsidiary of SCANA, owns 24,500 miles of power distribution lines and more than 15,700 miles of gas transmission mains; it also operates 17 fossil-fueled, nuclear, and hydroelectric power generation facilities with 5,695 MW of capacity. Its service area covers 23,000 sq. mls.SCE&G purchases additional power from other independent generators and utility companies, including SCANA-owned affiliate South Carolina Generating, and it sells wholesale power to other utilities and marketers.

Degremont designs, builds, and operates water treatment plants worldwide to purify water and treat wastewater. The company has operations in more than 70 countries, and its plants provide more than 1 billion people with potable water. It is a specialist in designing and constructing facilities for seawater desalination by the means of reverse osmosis. It also designs and builds sludge treatment facilities. In the US the group operates through subsidiary Infilco Degremont. United Water formed a joint venture with Infilco Degrement in 2009 to operate a Water Environmental Research Center in Richmond,Virginia.

Zephyr Environmental provides consulting, training, and data systems services relating to such areas as air quality, water quality, business protection programs, environmental health and safety, risk management, waste management, and regulatory tracking. The company has undertaken projects for clients in North and South America, Europe, the Middle East, and the Asia/Pacific region. Customers have included oil and gas companies, as well as companies in the cement manufacturing, chemical, pharmaceutical, and semiconductor industries. Zephyr Environmental operates from offices in Texas (Austin and Houston) and in Maryland. It also maintains an office in Dubai.

South West Water, one of the main subsidiaries of Pennon Group, provides water and wastewater services to 1.6 million people (more during the summer tourism season) in England's South West region. The company's service territory covers nearly 4,300 square miles and includes Devon, Cornwall, and parts of Dorset and Somerset. South West Water maintains more than 9,320 miles of water mains. Because 8 million tourists come to the region annually to swim at its numerous beaches, the utility is responsible for environmental cleanup in the region. It instituted a Clean Sweep program to improve the treatment of coastal sewage and meet European Union guidelines. The utility was privatized in 1989.

Shell International Renewables (doing business as Shell Renewables) may be able to turn them into fuel to power homes and vehicles. The company oversees many of the parent Royal Dutch Shell's operations in alternative fuels, was formed in 1997 to commercially explore the global possibilities of new low-carbon power systems. Shell Renewables markets and distributes alternative energies from the sun, the wind, hydrogen (technically an energy carrier rather than energy source), and bio-fuels worldwide. It is researching hydrogen created from natural gas and bio-fuels, made of everything from corn to algae, to replace gasoline in cars.

Terranext focuses its earthbound geotechnical engineering expertise on the next project, as well as the one it is currently working on. An affiliate of engineering group BE&K, Terranext provides environmental engineering and consulting services to industrial, commercial, and government customers through half a dozen offices (in Alabama, Arizona, Colorado, Georgia, Kansas, and New Jersey). The company's services include air quality management, cultural, and natural resource conservation, energy reduction engineering, pollution prevention, water management, and site investigation and remediation. Since 1985 the woman-owned business has conducted more than 3,000 environmental projects.

BlueStar Energy intends to burn bright in the firmament of independent electricity providers. Serving customers in the deregulated markets of Maryland, Illinois, Pennsylvania, and Washington, DC, the company offers variable- and fixed-rate and custom plans along with green energy to industrial, commercial, and residential customers. Its energy efficiency program examines customers' energy usage and offers services to decrease costs including reworking interior and exterior lighting, monitoring power use, rewiring fixtures, and performing exterior maintenance. BlueStar Energy spreads it power from offices in Chicago and Peoria, Illinois.

China Hydroelectric Corporation, through its subsidiaries, engages in the acquisition, ownership, development, and operation of hydroelectric power projects in the People's Republic of China. The company sells electricity to the power grids. It owns 12 operating hydroelectric power projects, as well as has a controlling interest in 1 operating hydroelectric power project in the provinces of Zhejiang, Fujian, Yunnan, and Sichuan. As of December 31, 2009, the company has an installed capacity of 376.6 MW. China Hydroelectric Corporation was founded in 2006 and is headquartered in Beijing, the People's Republic of China.

Massive power resource, Massachusetts Municipal Wholesale Electric Company (MMWEC) provides power supply services to its members -- 23 of the state's 40 municipal utilities (28 utilities are also participants in MMWEC power supply projects). The power supplier has about 715 MW of generating capacity from interests in fossil-fueled and nuclear power plants in the northeastern US, and it negotiates bulk electricity purchases from other generators for its members. MMWEC is the operator and principal owner of the Stony Brook Energy Center, a 520 MW, combined-cycle intermediate and peaking generating station in Ludlow, Massachusetts.

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