EDP-Energias de Portugal, S.A. engages in the generation, supply, and distribution of electricity. It operates hydroelectric and thermal power stations, as well as wind, coal, and natural gas combined cycle power plants. EDP-Energia also involves in the supply and distribution of natural gas. It primarily operates in Portugal, Spain, France, Brazil, and the United States. EDP-Energia was incorporated in 1976 and is based in Lisbon, Portugal

Terranext focuses its earthbound geotechnical engineering expertise on the next project, as well as the one it is currently working on. An affiliate of engineering group BE&K, Terranext provides environmental engineering and consulting services to industrial, commercial, and government customers through half a dozen offices (in Alabama, Arizona, Colorado, Georgia, Kansas, and New Jersey). The company's services include air quality management, cultural, and natural resource conservation, energy reduction engineering, pollution prevention, water management, and site investigation and remediation. Since 1985 the woman-owned business has conducted more than 3,000 environmental projects.

Dee Valley Group, operating through its Dee Valley Water unit, supplies water to more than 106,000 households and 8,250 commercial, industrial, and business customers in North East Wales and Cheshire. Dee Valley Water, formed from the combination of Wrexham Water and Chester Waterworks, supplies water to an 831-sq.-km. area. Dee Valley Water exited its nonwater operations in 2002. The company has been investing in its mains and distribution system to preventage leakage, and in 2005 it completed a 15-year water main rehabilitation program. It also commissioned a water treatment works at Pendinas. Dee Valley Group was created in 1994 as the holding company for Wrexham Water. Axa Sun Life owns 35% of the company.

ENVIRON is looking to clean up financially while helping to clean up the environment. An international environmental consulting firm, ENVIRON specializes in assessing risk factors related to the presence of chemicals in the environment and in products such as food, drugs, medical devices, and consumer goods. The consulting firm also helps clients comply with various environmental regulations. The company operates through two practices: environmental sciences and energy services; and health sciences. ENVIRON maintains offices in 18 countries the US, Europe, and the Asia/Pacific region, and has completed projects in more than 70 countries.

ITC Holdings Corp. (NYSE: ITC) invests in the electricity transmission grid to improve electric reliability, expand access to markets, lower the overall cost of delivered energy and allow new generating resources to interconnect to its transmission systems. The largest independent electricity transmission company in the country, ITC operates high-voltage transmission systems in Michigan’s Lower Peninsula and portions of Iowa, Minnesota, Illinois, Missouri and Kansas, serving a combined peak load in excess of 25,000 megawatts through its regulated operating subsidiaries, ITCTransmission, Michigan Electric Transmission Company (METC), ITC Midwest and ITC Great Plains. ITC also focuses on new areas where significant transmission system improvements are needed through ITC Grid Development and its subsidiaries.

Ferrostaal Incorporated is betting on the sun. The company is a subsidiary of the German industrial and heavy construction conglomerate Ferrostaal AG and provides its parent's alternative energy business in North America. It operates, with Solar Millennium, a joint venture called Solar Trust of America (STA) that concentrates on solar power generation. The International Petroleum Investment Company of Abu Dhabi bought a majority stake in Ferrostaal from MAN SE in 2009 and dropped the former parent company's brand from what had been called MAN Ferrostaal.

Union Gas has a habit of bringing natural gas and energy consumers together. The utility, a subsidiary of midstream maven Spectra Energy transmits and distributes natural gas to more than 1.3 million residential and business customers in more than 400 communities throughout most of the Canadian province of Ontario. It also provides gas transportation and storage services for other utilities and businesses in Canada and the US. Union Gas operates 3,000 miles of transmission pipeline, 37,000 miles of distribution main and service pipeline, and 22 underground storage facilities.

Carbtrol doesn't care about your carbohydrate consumption; instead, the company works to protect the health of the environment. Carbtrol makes activated carbon filters for air and water treatment, along equipment used for groundwater remediation and soil vapor extraction. In addition, the company supplies treatment systems designed to allow golf courses and car washes to recycle water. Carbtrol was founded in 1983. The company's primary product in the early years was activated carbon systems. It expanded its product line to include engineered packages using air stripping, vapor extraction technologies, and ion exchange treatment.

Delta Natural Gas Company, Inc. distributes or transports natural gas in central and southeastern Kentucky. It operates through two segments, Regulated and Non-Regulated. The Regulated segment sells and distributes natural gas to its retail customers primarily in 23 rural counties. This segment also transports gas to industrial customers on its system who purchase gas in the open market, as well as transports gas on behalf of local producers and other customers not on its distribution system. The Non-Regulated segment purchases natural gas in the open market, primarily from Kentucky producers, and resells this gas to industrial customers on its distribution system and to others not on its system. This segment also produces natural gas that is sold to Delgasco for resale in the open market. Delta Natural Gas Company, Inc. owns approximately 2,500 miles of natural gas gathering, transmission, distribution, storage, and service lines; and holds leases for the storage of natural gas under 8,000 acres located in Bell County, Kentucky. It serves approximately 37,000 customers. Delta Natural Gas Company, Inc. was founded in 1949 and is headquartered in Winchester, Kentucky.

Piedmont Natural Gas Company, Inc., an energy services company, distributes natural gas to residential, commercial, industrial, and power generation customers in portions of North Carolina, South Carolina, and Tennessee. It also operates various energy-related businesses, including unregulated retail natural gas marketing, interstate natural gas storage, and intrastate natural gas transportation. As of October 31, 2009, the company served 952,469 retail customers and 61,000 customers served by municipalities. Piedmont Natural Gas Company, Inc. was founded in 1949 and is headquartered in Charlotte, North Carolina.

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