China Three Gorges Project Corporation (CTGPC) is building the world's largest hydropower project -- the Three Gorges on the Yangtze River. Located near the Xilingxia gorge, a 185-meter-high project dam controls a drainage area of 1 million square km and an average annual runoff of 451 billion cubic meters. Construction on the massive project broke ground in 1994 and is expected to formally wrap up in late 2008. Subsidiary China Yangtze Power was set up in 2002 to manage two power plants, Gezhouba and Three Gorges. In 2009, in a major cash infusion, this unit paid its parent for the remaining 18 generators at the Three Gorges project.

Nebraska Public Power District (NPPD) electrifies the Cornhusker State. The government-owned electric utility provides power in 91 of the state's 93 counties. The firm has a generating capacity of more than 3,000 MW and operates more than 5,000 miles of transmission lines. NPPD distributes electricity to more than 88,000 retail customers in 80 cities and towns; it also provides power to about 1 million customers through wholesale power contracts with 52 towns and 25 public power districts. In addition, NPPD purchases electricity from the federally owned Western Area Power Administration and operates a surface water irrigation system.

Summerleaze has blown through a number of businesses -- aggregates, waste disposal, and renewable energy. The family-owned company, originally in the gravels/aggregates business, branched into using methane gas from the waste disposal landfills to make fuel. After acquiring renewable energy firm Thomas Graveson, it created Summerleaze RE-Generation, which has enough capacity (43 MW) to serve 70,000 houses from sites across the UK. Ennate Technology provides power generation equipment sales, maintenance, and hire services; its Green Hydrogen subsidiary supplies renewable hydrogen and oxygen for clients. Summerleaze also has a biogas unit, Summerleaze AnDigestion.

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.

AMEC Geomatrix Consultants hopes to be chosen to provide engineering, environmental, and geological consulting services. Its environmental-related services include support for air quality compliance, licensing and regulatory assistance, site assessment, and remediation. The firm also provides assessments of seismic activity and earthquake-related engineering services, cartography and other geographic information systems (GIS) design, decision analysis consulting, and natural resources optimization. AMEC Geomatrix, a unit of AMEC Earth & Environmental, conducts projects worldwide and has 19 offices located throughout the US, and one in Canada.

Portsmouth Water Limited serves an area of the UK extending from South East Hampshire to West Sussex, and from the River Meon to the River Arun. Portsmouth Water supplies about 160 million liters of water per day. Its 301,200 customers include industries, government establishments, and commercial businesses, as well as a residential population of 657,000. The company operates a 3,270-km network of water mains and about 20 treatment works. About 85% of the company's supply comes from groundwater sources.

Puerto Rico Electric Power Authority (PREPA) is prepared to serve an entire island nation. Founded in 1941, the government-owned utility is the sole electricity distributor for Puerto Rico, where it serves approximately 1.4 million residential and business customers. PREPA owns five primarily fossil-fueled power plants that give it nearly 5,800 MW of generating capacity, and it has more than 30,000 miles of transmission and distribution lines. In order to keep up with increasing demand, the Puerto Rican government has allowed independent power producers to build cogeneration plants on the island to sell power to PREPA.

Enerchina Holdings focuses on offering a variety of energy and public utility services in about 40 cities in China. The company generates electrical power, as well as provides more than 400,000 tons of natural gas every year through Panva Gas Holdings. Panva also offers pipeline network construction, transportation, storage, and wholesale of natural gas. Enerchina Holdings serves more than 3 million customers. The company is researching and developing other clean energy sources, including different uses of coal. Chairman Ou Yaping owns about 52% of Enerchina Holdings.

Czechs want to power up, they turn to state-controlled EZ, (the lead company of CEZ Group) which produces, distributes, and sells electricity and heat to 3.5 million customers in the Czech Republic. EZ, formed by the government in 1992, is now publicly traded, although in 2008 the government continued to control 63% of its stock. Subsidiaries and affiliates of EZ form what is known as the CEZ Group, which has operations in coal mining and power generation and marketing across Central and Southeastern Europe. The CEZ Group serves 7 million customers and has about 12,200 MW of generating capacity.

San Diego County Water Authority (SDCWA), which is in charge of supplying about 90% of San Diego County's potable water supply (mainly from the Colorado River). Formed in 1944, the authority provides water to its 24 member agencies (primarily cities and municipal districts), which in turn distribute the water to residents and businesses in the county. SDCWA also has hydroelectric power generation operations.

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