CMS Energy Corporation, through its subsidiaries, operates as an energy company primarily in Michigan. It operates in three segments: Electric Utility, Gas Utility, and Enterprises. The Electric Utility segment engages in the generation, purchase, distribution, and sale of electricity. The Gas Utility segment involves in the purchase, transmission, storage, distribution, and sale of natural gas. The Enterprises segment engages in independent power production and marketing. This segment owns power generation facilities fueled mostly by natural gas and biomass. At December 31, 2009, this segment had ownership interests in independent power plants totaling 1,202 gross Megawatt. The company serves individuals and companies operating in the alternative energy, automotive, chemical, metal, food products, and various other industries. As of December 31, 2009, it served 1.8 million electric customers and 1.7 million gas customers. The company was founded in 1987 and is based in Jackson, Michigan.

EVN spreads energy evenly across its territory in Lower Austria and beyond. The utility -- one of Austria's largest -- provides electricity, natural gas, heat, and related services. Outside its home borders, the company has gained control of electricity suppliers in Bulgaria and Macedonia, as these countries privatized their electricity industry. It is also marketing its environmental services (water, wastewater treatment, and waste incineration activities) around Europe. The company has built drinking water and wastewater treatment plants in Croatia, Poland, and Russia EVN has also put its waste-incineration know-how to good use and has a waste-to-energy plant in Moscow.

ACEA S.p.A. municipal utility in Italy, it is also Italy's #1 water utility and a top electricity distributor. ACEA provides water to more than 7 million people and distributes power to more than 2.7 million homes and businesses in Rome and surrounding areas. In keeping with Europe-wide utility liberalization, the City of Rome has sold 49% of ACEA on the public market. The former monopoly has also built on Enel's Roman distribution assets, and through a joint venture with Electrabel, it has expanded into power generation, energy marketing, and natural gas distribution. ACEA also has international utility interests.

CHOICE! Energy Services and Texas Energy Services divisions the company provides consulting and price comparison services to retail customers. CHOICE! Energy Services also provides commodity brokerage and consulting services to energy producers and marketers, utilities, banks, and other corporations. Customers include BP and Morgan Stanley. President and CEO Javier Loya formed CHOICE! Energy in 1994.

DTE Energy Company, together with its subsidiaries, operates as an electric and natural gas utility company in Michigan. It also involves in non-utility operations. The company’s Energy Utility segment engages in the generation, purchase, distribution, and sale of electricity in southeastern Michigan. It generates electricity from various fuels, including coal, as well as from nuclear and hydro facilitates. As of December 31, 2009, this segment owned and operated approximately 677 distribution substations and approximately 423,600 line transformers; and supplied electricity to 2.1 million residential, commercial, and industrial customers in southeastern Michigan. The company’s Gas Utility segment engages in the purchase, storage, transmission, distribution, and sale of natural gas in Michigan. As of December 31, 2009, this segment’s distribution system included approximately 19,000 miles of distribution mains, 1,177,000 service lines, and 1,312,000 active meters. It also owned approximately 2,100 miles of transmission lines that deliver natural gas; and supplied natural gas to approximately 1.2 million residential, commercial, and industrial customers throughout Michigan, as well as to approximately 17,000 customers in Adrian, Michigan. The company’s non-utility operations include natural gas pipelines and storage; unconventional gas exploration, development, and production; power and industrial projects, and coal transportation and marketing; and energy marketing and trading operations. Its customers include electric utilities, merchant power producers, integrated steel mills, and industrial companies. DTE Energy Company was founded in 1995 and is based in Detroit, Michigan.

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.

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.

Reliance Infrastructure, formerly Reliance Energy, transmits and distributes electricity across India. The company's service territory covers an area exceeding a 124,300 square kilometers and includes the major cities of Delhi and Mumbai. Reliance Infrastructure operates power plants that generate more than 940 MW of capacity. Part of the Anil Dhirubhai Ambani Group, Reliance Infrastructure delivers more than 36 billion units of electricity to more than 30 million consumers. The company is also a major player in India's heavy construction market, and is engaged in constructing roads and airports, and developing urban infrastructure. It also has interests in real estate and retail hospitality.

SolarCraft Services designs and installs solar energy systems that capitalize on California's sunshine. The company has installed more than 4,300 solar energy systems for residential and commercial customers in Northern California, including numerous vineyards and wineries. Its largest project was a 1.1 MW system at Paramount Farms, the world's largest grower and processor of pistachios and almonds. SolarCraft Services uses solar panels made by Mitsubishi, Sharp and SunPower, panels for swimming pools made by FAFCO, and components by SatCon. The company was founded in 1984.

Ontario Power Generation produces most of the electricity supply for the Canadian province of Ontario. The company, owned by the province, operates fossil-fueled, nuclear, hydroelectric and wind power plants that give it a generating capacity of almost 22,000 MW. Ontario Power sells wholesale power to utilities (including Hydro One) and businesses in Ontario; it also markets electricity in interconnected Canadian and US markets. It operates 65 hydroelectric, five thermal (fossil fuel), three nuclear, and two wind-power generating stations. In addition, Ontario Power operates co-owned and leased facilities, including two gas-fired combined cycle stations and two nuclear stations.

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