Ratchaburi Electricity Generating is a powerful force. The company, known as Ratch, is Thailand's largest independent electric utility. Subsidiary Ratchaburi Electricity Generating Company runs the power plant, which has a total capacity of about 4,500 MW of electricity. Ratchaburi Energy Company, the other major subsidiary, funds smaller power plants and other power generating operations. Ratch also owns stakes in ethanol and natural gas companies and it participates in a joint venture with SouthEast Asia Energy to run a hydro-electricity plant in Laos. Established in 2000, the company is 45% owned by the Thai government via the EGAT Public Company.

Clean Energy Fuels Corp., together with its subsidiaries, provides natural gas as an alternative fuel for vehicle fleets in the United States and Canada. It designs, builds, finances, and operates fueling stations; and supplies compressed and liquefied natural gas. Clean Energy Fuels Corp. also produces renewable biomethane, which could be used as vehicle fuel. In addition, it provides natural gas conversions, alternative fuel systems, application engineering, service and warranty support, and research and development for natural gas vehicles. As of December 31, 2009, the company served approximately 390 fleet customers operating 17,790 natural gas vehicles in public transit, refuse hauling, airports, taxis, seaports, and regional trucking markets. It owned and operated 196 natural gas fueling stations in Arizona, California, Colorado, the District of Columbia, Florida, Georgia, Idaho, Maryland, Massachusetts, Nevada, New Jersey, New Mexico, New York, Ohio, Oklahoma, Texas, Virginia, Washington, and Wyoming; and British Columbia and Ontario, Canada. Clean Energy Fuels Corp. was incorporated in 2001 and is headquartered in Seal Beach, California.

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.

Staying true to its more-than-a-century-old watery origins, Turlock Irrigation District (TID) provides irrigation services to almost 6,000 farmers in its service area (150,000 acres of farmland). The company also provides electric generation, transmission, and distribution services to more than 98,000 retail customers in and around Turlock, California, and it sells power to wholesale customers. TID became a generator and distributor of electricity in 1923. The district provides electric service to its customer base in a 662-sq.-ml. service area encompassing portions of Merced, Stanislaus, and Tuolumne counties.

Wheelabrator Technologies is on a roll. A subsidiary of solid-waste processing giant Waste Management, the company operates municipal-waste incinerators and trash-to-steam plants that convert 7 million tons of municipal solid waste annually into energy. Wheelabrator operates 16 waste-to-energy plants that burn solid waste to produce high-pressure steam; that steam turns turbines, generating more than 800 MW of electricity -- enough to power more than 900,000 homes. It also has five independent power producers (IPPs) that combust a combination of trash, waste wood, tires, coal, and gas to generate another 200 MW of electricity. Wheelabrator operates in the northeastern US, California, Florida, and Washington.

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.

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.

Clean water is the goal of H2O Innovation. For amusement parks, campgrounds, cities, schools, zoos, and other enterprises, H2O Innovation uses micro filtration, ultra filtration, nanofiltration, and reverse osmosis to create drinking water, as well as clean water for manufacturing and other purposes. H2O Innovations also treats wastewater, offers equipment for the maple syrup industry, and desalinates seawater and brackish water. In 2007 it became the first North American company to be listed on the Alternext (Euronext) Exchange in Paris. By 2008 the company had installed more than 400 systems in Canada, the US, and elsewhere.

Keeping a sharp eye out for the well-being of Iowa's citizens, Central Iowa Power Cooperative provides electricity transmission and generation services to 13 member distribution cooperatives (12 rural electric cooperatives and one municipal cooperative), which in turn serve about 320,000 residential and 7,000 industrial and commercial customers. Central Iowa Power's member distribution cooperatives deliver power to commercial businesses, farmsteads, industrial parks, manufacturers, urban residences, and other customers, in a service area that stretches 300 miles diagonally across the state from Shenandoah in the southwest to the Mississippi River in the east.

Energieversorgung Weser-Ems (EWE) is a German powerhouse. Operating through some 30 subsidiaries and associated companies, EWE is a multi-service energy company primarily involved in distributing natural gas and electricity. In the past few years, however, EWE has expanded its activities to include telecommunications and information technology. EWE is Germany's fifth-largest energy company, serving more than one million electricity customers and providing about 770,000 customers with natural gas. Subsidiary EWE NaturWatt sells electricity exclusively from renewable sources. In 2008, German electricity distributor EnBW agreed to buy 26% of EWE for just more than $3 billion.

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