North Wind works to keep the air clean, the ground fresh, and the water clear in North America. The environmental consulting firm's services include site assessment, soil and groundwater remediation, geographic information system (GIS) data, hazardous and nonhazardous waste management, and project engineering and construction. North Wind has expanded by buying South Carolina-based Pinnacle Consulting Group, which offers engineering, environmental, and information technology consulting services.

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.

Porvair wants to reign in pores. The company makes specialist porous filtration products out of ceramics, plastic, metal, and carbon for a variety of industries, including aerospace, aluminum, high-purity liquids, life sciences, and nuclear maintenance. The company's specialist laboratory filter systems are used by pharmaceutical and drug companies for diagnostic and testing kits, medical devices, and pharmaceutical production. Porvair also makes high performance bi-polar planes for fuel-cell manufacturers. The company operates in both the UK and US.

Coast Electric Power Association when it comes to providing residents in three southern Mississippi counties with electricity. The utility uses a 6,400-mile distribution network to serve its more than 76,000 members (the great majority or which are residential customers) in Hancock, Pearl River, and Harrison counties. Coast offers electronic fund transfer and average monthly payment plans and rebates on energy efficient home improvements. The utility's power is generated by South Mississippi Electric Power, an association of Coast and 10 other cooperatives. It partners with Touchstone Energy Cooperatives.

Western Area Power Administration is one of four power marketing agencies of the US Department of Energy, the enterprise operates 57 hydroelectric power plants and one fossil-fueled power generation facility with a combined generating capacity of 10,395 MW. It also manages and maintains more than 17,000 miles of transmission lines. Western Area Power Administration sells wholesale power to investor-owned, government-owned, and cooperative utilities, power marketers, federal agencies, native American tribes and other electricity users in 15 western states over a 1.3-million-sq.-mi. service area.

Targa Resources Corp., through its general and limited partner interests in Targa Resources Partners LP, provides midstream natural gas and natural gas liquid (NGL) services in the United States. It engages in gathering, compressing, treating, processing, and selling natural gas; and storing, fractionating, treating, transporting, and selling NGLs and NGL products. The company owns and operates approximately 11,169 miles of natural gas pipelines and approximately 800 miles of NGL pipelines, with natural gas gathering systems covering approximately 13,500 square miles and 21 natural gas processing plants with access to natural gas supplies in the Permian Basin, the Fort Worth Basin, the onshore region of the Louisiana Gulf Coast, and the Gulf of Mexico. It sells its products to petrochemical manufacturers, refineries, multi-state retailers, and independent retailers. Targa Resources Corp. was founded in 2004 and is based in Houston, Texas.

ALLETE provides light to the northern climes. Most of its business is classified within its regulated operations, which include electric, gas, and water utilities located in northeastern Minnesota and northwestern Wisconsin. Those operations are conducted through subsidiaries Minnesota Power (about 145,000 customers) and Superior Water, Light and Power (about 35,000 customers for its electric, gas, and water utilities). ALLETE's other segment includes coal mining operations, emerging technologies related to electric utilities, and a real estate business (large land tracts in Florida). Subsidiary BNI Coal operates a mine in North Dakota that supplies, primarily, two generating co-ops, Minnkota Power and Square Butte.

Active Power, Inc., together with its subsidiaries, designs, manufactures, and markets critical power quality solutions. It provides various products that deliver continuous clean power, and protects customers from voltage fluctuations, such as surges and sags, and frequency fluctuations, as well as offer temporary power to bridge the gap between a power outage and the restoration of utility power. The company offers CleanSource UPS, a battery free uninterruptible power supply system (UPS) that integrates UPS electronics and flywheel energy storage system into one compact cabinet. Active Power, Inc. also provides CleanSource DC, which is a battery-free replacement option for lead-acid batteries for use in bridging power; CoolAir DC; CoolAir UPS; and GenSTART, which is a battery-free, starting modular system. It offers continuous power systems that comprise UPS system, switchgear, and a generator under the PowerHouse brand name. Active Power, Inc. also provides services, including engineering, installation, start-up, monitoring, and repair for its products. The company serves data centers, manufacturing, technology, broadcast and communications, financial, utilities, healthcare, government, and airport industries. It sells its products through direct sales employees, value added resellers, manufacturers representatives, distributors, strategic IT partners, and original equipment manufacturer partners in the United States, Europe, the Middle East, Africa, the Asia Pacific, and Latin America. The company was founded in 1992 and is headquartered in Austin, Texas.

CH Energy Group powers New York state's Hudson Valley. Utility subsidiary Central Hudson Gas & Electric provides electricity to about 300,000 electric and 74,000 natural gas customers in eight counties located in Mid-Hudson River Valley, and delivers natural gas and electricity in a 2,600-square-mile service area that runs from New York City in the south, to Albany. Subsidiary CHEC oversees CH Energy Group's nonregulated businesses in the Northeast and Mid-Atlantic, including petroleum product distribution, alternative energy projects, and energy management services.

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.

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