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.

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.

NOVEC is no novice when it comes to electricity distribution. Northern Virginia Electric Cooperative (NOVEC) is a member-owned utility that serves more than 130,000 residential, commercial, industrial, and government customers in northern Virginia. NOVEC receives its power supply primarily from generation and transmission utility Old Dominion Electric Cooperative. The company also markets natural gas and long-distance phone services to retail customers in Virginia and Maryland through its NOVEC Energy Solutions unit. Subsidiary NOVEC Solutions sells energy appliances. NOVEC was formed in 1983 through the merger of Prince William Electric Cooperative and Tri-County Electric Cooperative.

UniSource Energy has more than one source of income, but it gets most of its revenues from its energy utilities. The company's Tucson Electric Power unit generates and distributes electricity to almost 402,000 customers in southeastern Arizona. The unit has about 2,230 MW of generating capacity. Subsidiary UniSource Energy Services provides electricity (through UNS Electric Services) to 90,000 customers and natural gas (through UNS Gas) to 146,000 customers in 30 communities in northern and southern areas of the state. UniSource's Millennium Energy Holdings unit invests in unregulated energy and emerging technology companies.

Wisconsin Energy Corporation company's utilities provide electricity to more than 1.1 million customers and natural gas to more than 1 million customers in eastern and northern Wisconsin and Michigan's Upper Peninsula. It also serves 465 steam customers in downtown Milwaukee. Wisconsin Energy has about 5,500 MW of generating capacity, primarily from coal-fired and nuclear-powered plants. The company's primary utility subsidiaries, Wisconsin Gas and Wisconsin Electric, operate together as We Energies. Other operations include real estate development and renewable energy technology.

IDACORP, Inc., through its subsidiary, Idaho Power Company, engages in the generation, transmission, distribution, sale, and purchase of electric energy in the United States. It owns and operates 17 hydroelectric generating plants located in southern Idaho and eastern Oregon, as well as 2 natural gas-fired plants situated in southern Idaho; and owns interests in 3 coal-fired steam electric generating plants located in Wyoming, Nevada, and Oregon. As of December 31, 2009, the company supplied electric energy to approximately 490,000 general business customers involved in food processing, electronics and general manufacturing, forest products, beet sugar refining, and winter recreation industries. It had a network of approximately 4,796 pole miles of high-voltage transmission lines, 23 step-up transmission substations located at power plants, 22 transmission substations, 8 switching stations, 223 energized distribution substations, and approximately 26,675 pole miles of distribution lines. IDACORP, Inc., through its other subsidiaries, invests in housing and other real estate properties in the United States, Puerto Rico, and the U.S. Virgin Islands; and has a 50% interest in 9 hydroelectric plants with a total generation capacity of 45 MW in Idaho and northern California. The company was founded in 1915 and is based in Boise, Idaho.

WPPI Energy (formerly Wisconsin Public Power) generates, purchases, and supplies wholesale electricity to 51 municipal distribution utilities, which in turn serve more than 192,000 homes and businesses in Wisconsin, Upper Michigan and Iowa. Founded as a political subdivision of the State of Wisconsin, the utility was formed by its member-owners (the municipalities) in 1980. WPPI Energy has interests in power plants that give it a capacity of more than 1,120 MW. It also engages in wholesale energy transactions with other regional utilities and energy marketers and is a major advocate of green energy power resources.

Tri-State Generation and Transmission Association supplies wholesale electricity to 44 rural distribution utilities that serve about 1.5 million customers (more than 599,300 meters) in Colorado, Nebraska, New Mexico, and Wyoming (New Mexico was a late addition to the association's service region). The member-owned cooperative has a generating capacity of 3,840 MW from its interests primarily in fossil-fueled power plants, and it operates 5,270 miles of transmission lines. Tri-State Generation and Transmission also purchases power and sells its excess supply to other utilities.

Catalytic Combustion Corporation clears the air -- literally and alliteratively. The company makes systems, processes, and products to help customers eliminate volatile organic compounds (VOCs) and other pollutants in order to meet air-quality standards. Catalytic Combustion's catalysts -- substances that accelerate the rate of chemical reactions -- are used in a host of industries and products, ranging from appliances to graphic arts to nuclear power plants. The company makes catalysts from materials such as ceramics, metal foil, and wire mesh. Catalytic Combustion was founded in 1950.

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.

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