Tokyo Electric Power Company (TEPCO), which supplies power to a population of 44 million customers in Tokyo, Yokohama, and the rest of the Kanto region. One of the world's largest electric utilities, TEPCO's 190 power plants have the generating capacity of approximately 64,000 MW, primarily produced by thermal, nuclear, and hydroelectric power sources. Through interests in telecom businesses, the company offers telephony and Internet services; it also has international consulting and power generation operations. Other businesses include construction, real estate, and transportation companies. It also invests in independent power producers in other countries.

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.

Nature Group (formerly Nature Technology Solutions) provides wastewater treatment services to the oil, shipping, and offshore industries. Its technologies treat various types of industrial, marine, and oil industry waste streams, including using an environmental-friendly additive that helps remove hydrocarbons in oily wastewater. It helps operate port treatment plants in Gibraltar and Tananger, Norway, and a sewage treatment plant in Gibraltar; it is also involved in decommissioning refineries, installing treatment plants, and treating wastewater on offshore rigs.

Emera is an emerging force in a new energy era. Subsidiary Nova Scotia Power Inc. (NSPI) generates, transmits, and distributes more than 97% of the electricity in Nova Scotia, where it serves 486,000 residential, commercial, and industrial customers. Most of NSPI's more than 2,290 MW generating capacity is from fossil fuel plants. Emera has electric utility operations into the US through its Maine-based Bangor Hydro-Electric, which serves about 117,000 customers. It markets wholesale energy and provides asset management services. Emera owns Brunswick Pipeline (which ships LNGs), and has a minority stake in Maritimes & Northeast Pipeline (natural gas). It also has minority stakes in utilities in the Caribbean.

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.

AEA Technology has hitched its wagon to the climate change star, focusing on government and private sector efforts to combat global warming, develop low-carbon processes, and monitor carbon and emissions trading. AEA Technology offers consulting, program management, and emergency response services for commercial, government, and industrial customers. Other areas of expertise include agriculture, health, business innovation, and transport. It is a major provider of advisory services to the UK government on climate change issues and technologies.

Scottish and Southern can speak with a Scottish burr or a southern English clip. The integrated company is one of the UK's top energy firms, distributing power and gas to 9.2 million customers through subsidiaries Southern Electric, Scottish Hydro Electric, SWALEC, and Atlantic Electric and Gas. Scottish and Southern's regulated utility assets include 79,300 miles of power transmission and distribution lines that serve 3.5 million end-users. Scottish and Southern has 11,300 MW of generating capacity. It also distributes gas to 5.7 million customers. Other operations include gas exploration, energy trading, wind farms, electrical and environmental contracting, gas storage, and retail appliance sales.

Mesa Power Group, it takes an oil tycoon from Texas to raise the profile of wind energy in North America. Controlled by veteran oilman and renewable energy proponent T. Boone Pickens, who gained national attention with the Pickens Plan, a campaign aimed at reducing US dependence on foreign oil, the company is engaged in developing and investing in wind power projects. It acquires these projects and completes development on them through a joint venture with GE called the American Wind Alliance (AWA). It typically targets projects in Canada and the US that have secured land control, access to transmission lines, and minimum capacity of 100 megawatts.

Sumter Electric Cooperative shines more light across the Sunshine State. Known as SECO, the customer-owned utility distributes electricity to 170,000 homes and businesses across the rural Central Florida region comprised of Citrus, Hernando, Lake, Levy, Marion, Pasco, and Sumter counties. The coop operates 11,350 miles of electric lines and 47 substations. SECO's engineers design electrical facilities for new shopping centers and business parks and perform cost estimates for putting utilities underground in subdivisions. The co-op is a member of and receives generation and transmission services from Seminole Electric Cooperative.

Midwest Energy for their power and gas needs. The utility serves approximately 48,000 electricity customers and 42,000 natural gas customers in central and western Kansas. It also has some power generation operations; it purchases most of its electric supply from wholesale marketers. The company's Midwest United Energy subsidiary is a competitive natural gas supplier in four states, and its WestLand Energy unit sells propane to Kansas consumers; it has sold its telecommunications business. Midwest Energy was formed in 1981 when the Central Kansas Electric Cooperative acquired investor-owned Central Kansas Power.

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