American Electric Power Company, Inc. engages in the generation, transmission, and distribution of electric power. It generates electricity using coal and lignite, natural gas, nuclear, and hydroelectric energy. The company distributes electric power at wholesale to other electric utility companies, rural electric co-operatives, municipalities, and other market participants, as well as to retail customers in its service areas. It also operates nonregulated wind farms and barging operations, as well as provides various energy-related services. The company operates in the states of Arkansas, Indiana, Kentucky, Louisiana, Michigan, Ohio, Oklahoma, Tennessee, Texas, Virginia, and West Virginia. As of December 31, 2008, it owned or leased approximately 37,000 megawatts of power generation capacity. The company was founded in 1906 and is based in Columbus, Ohio.

Companhia Paranaense de Energia – Copel engages in the generation, transmission, distribution, and sale of electricity for industrial, residential, commercial, and rural customers primarily in the State of Parana, Brazil. It owns and operates 18 power plants, including 17 hydroelectric power plants and 1 thermal power plant with an installed capacity of 4,550 MW; transmission system comprising 1,913 km of transmission lines and 30 substations; and distribution system, including 180,696 km of distribution lines and 350 substations. The company serves approximately 3,671,262 consumers. It also provides telecommunication and communication services consisting of broadband Internet, private networks IP/MPLS-VPN, videoconference, and hosting services to schools, banks, supermarkets, Internet providers, industries, public bodies, stores, and fixed and mobile telephone operators. In addition, company has 6,026 km of OPGW cables, installed between the main ring and urban radials, totaling 10, 054 km and reaching 226 cities Parana. Further, it distributes piped gas. The company was founded in 1954 and is headquartered in Curitiba, Brazil.

Pure water is the aim of water process engineering specialist Enpure. Enpure specializes in treating water, wastewater, and sludge for municipalities and businesses. Its services include process design and project management for water treatment facilities worldwide. There are more than 4,000 plants in 60 countries designed by Enpure. The company licenses the sonix ultrasound sewage treatment technology sold through Sonico, Enpure's joint venture with Atkins. It had been a part of the support services division of water utility AWG until its management (in partnership with Aberdeen Asset Management) bought out the company at the end of 2006. The company changed its name from PURAC at that time.

AGL Energy emerged from the Australian Gas Light Company (Australia's oldest energy company, founded in 1837). AGL Energy is the country's major electricity retailer. It is also a top gas retailer and distributor in Australia. AGL Energy retails gas to 1.4 million customers and electricity to 1.8 million customers. Its residential and small business customers are located in New South Wales, South Australia, and Victoria, while its commercial and industrial customers are primarily in Queensland. AGL Energy is also a leading renewable energy 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.

LifeSource Water Systems uses is customer satisfaction. The water treatment product company manufactures and distributes water filtration equipment to residential, commercial, and industrial customers. LifeSource Water Systems' system uses an activated carbon filter rather than salts or chemicals. Its Beotron branded systems have earned the Gold Seal certification issued by the Water Quality Association. The company operates primarily in California; it also maintains outlets in Idaho and Nevada. LifeSource Water Systems was founded in 1984.

New York Independent System Operator (New York ISO). The company, which replaced the New York Power Pool, manages and monitors wholesale activities on the state's transmission grid, which consists of some 11,000 miles of high-voltage lines. The New York ISO is charged with providing fair access to the state's competitive wholesale power market (37,400 MW of generating capacity), while ensuring the reliable, efficient, and safe delivery of power to New York's more than 19 million residents. The not-for-profit company is governed by a 10-person board of directors.

Sacramento Municipal Utility District (SMUD) doesn't want its name to be mud. One of the largest locally owned electric utilities in the US, SMUD serves about 592,000 residential and commercial customers in California's Sacramento and Placer counties. The utility generates half of its electricity (its 1,300-MW capacity is derived primarily from hydroelectric and cogeneration power plants) and buys the rest. SMUD also sells power to wholesale customers, and has one of the US's largest solar energy distribution systems. SMUD operates more than 10,200 miles of transmission and distibution lines across its 900-sq.-mi. service area.

Southern Nuclear Operating company, a subsidiary of Southern Company since 1990, operates six nuclear power units at three plant locations, which combined, provide about 20% of the electricity used in Alabama and Georgia. Southern Nuclear's Joseph M. Farley Nuclear Plant began commercial operation in 1977. The Edwin I. Hatch Nuclear Plant and the Alvin W. Vogtle Electric Generating Plant are jointly owned by Southern Company's Georgia Power (50%), Oglethorpe Power (30%), the Municipal Electrical Authority of Georgia (18%), and the city of Dalton.

Better PLC, or Better Place as it goes by, wants people to imagine a world free of oil. The startup, which was founded in 2007 on $200 million of venture capital, is teaming with automakers, battery manufacturers, energy companies, and governments to help make electric cars more viable worldwide. As an alternative to traditional gas stations, the company is attempting to build and operate an electric recharge grid to power electric car battery recharging stations, which drivers pay to access (much as phone users pay to access a mobile network). Better Place has begun work with partners in Australia, China, Denmark, Israel, Japan,and the US on this sustainable model. The company was founded by CEO Shai Agassi.

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