Calvalley Petroleum searches below the plateau for fuel for its customers. The company focuses on exploring for and producing oil and natural gas at Block 9 in the Republic of Yemen. The company, which has about 16 working wells (more than 50 have been drilled), produces some 5,000 barrels of oil each day. Its subsidiary Calvalley Petroleum (Cyprus) Ltd. is the operator of the property, which includes about 552,000 acres of land in the Sayun-Masila basin. Calvalley Petroleum has a net proved plus probable reserves of 7.8 billion barrels of oil equivalent.

Siemens Water Technologies Corp. company is a leading producer of water- and wastewater-treatment equipment worldwide. Through its Water and Wastewater Systems and Water Services and Products groups, Siemens Water Technologies provides services to municipal, industrial, and institutional clients. It has more than 200,000 installations on several continents and a portfolio of more than 900 water treatment products and technologies. Among its other services are ion exchange resin recycling and thermal reactivation processes that reduce carbon expenditure. The company is a subsidiary of Siemens Industry.

Pampa Energ�a is one of Argentina's largest fully integrated electricity companies. Through subsidiaries or co-controlled companies, it generates more than 7% of the total electricity in Argentina, transmits some 95% of the country's electricity through transmission lines owned and operated by subsidiary Transener, and distributes electricity to more than 2.6 million residential and commercial customers through subsidiary Empresa Distribuidora y Comercializadora Norte (Edenor), the largest electricity distributor in Argentina. Pampa Energ�a maintains fossil fuel, thermal, and hydroelectric generation operations. Its distribution, transmission, and hydroelectric activities are regulated by Argentina's government.

Aqua-Pure Ventures has developed a patented wastewater distillation process used in wastewater recycling. Primarily used for industrial applications, Aqua-Pure's Clear Solutions system provides evaporation technology that can easily mix with other wastewater-treatment methods. Among its many uses, Clear Solutions may be applied for treating medical wastewater and for seawater desalination. In North America Aqua-Pure distributes the Salsnes Filter, used by municipalities and industrial companies for treating wastewater. This technology, developed by the Salsnes company in Norway, can be installed in new plants or mixed with technology already in use.

Phoenix Natural Gas is the largest gas distribution business in Northern Ireland, being the owner and operator of the licence for the distribution network in the Greater Belfast Area and Larne. The distribution business is responsible for the development of the pipeline network and also for providing a 24/7 operational and transportation service platform to gas suppliers under the rules of the company's network code.The Phoenix network currently extends to 2,940 kilometres of intermediate, medium and low pressure mains, which distribute natural gas throughout the licence area, representing around 50% of the population of Northern Ireland. Phoenix Natural Gas manages the development of the both the physical network and market in Greater Belfast; already some 123,000 customers have been connected to natural gas in the 12 years it has been available to them. The business is regulated under licence by the Northern Ireland Authority for Utility Regulation (NIAUR).

The York Water Company engages in impounding, purifying, and distributing drinking water in Pennsylvania. It owns and operates two reservoirs, Lake Williams and Lake Redman, which together holds approximately 2.2 billion gallons of water. The company also has a 15-mile pipeline from the Susquehanna River to Lake Redman that provides access to an additional supply of 12.0 million gallons of water per day. As of December 31, 2009, it served approximately 180,000 residential, commercial, industrial, and other customers in 39 municipalities in York County and 7 municipalities in Adams County. The company was founded in 1816 and is based in York, Pennsylvania.

TransAlta has transformed itself from one of Canada's largest electric utilities into a global independent power producer with assets in Australia, Canada, and the US. The company has about about 8,990 MW of operational generating capacity. It trades and markets electricity and gas in Canada and the US. Most of TransAlta's generating capacity is coal-fired; the rest comes from gas-fired, hydroelectric, and alternative-energy plants. TransAlta has sold its regulated distribution and transmission businesses to focus on power generation and marketing, primarily to industrial and wholesale customers. The company has more than 80 power plants in Australia, Canada, and the US.

Pennichuck Corporation, through its subsidiaries, engages in the collection, storage, treatment, and distribution of potable water for domestic, industrial, commercial, and fire protection service in New Hampshire and Massachusetts. The company also provides non-regulated water management services, including monitoring, maintenance, testing, and compliance reporting services for water systems of various towns, businesses, and residential communities. In addition, Pennichuck Corporation involves in real estate management and commercialization activities. The company was founded in 1852 and is headquartered in Merrimack, New Hampshire.

Through its regulated utility subsidiaries, Aquarion distributes water to more than 180,000 homes and businesses (or about 580,000 people) in some 39 communities in Connecticut, Massachusetts, and New Hampshire. It is one of the 10 largest investor-owned utilities in the US. The company's Aquarion Services unit provides contract management of municipal water and wastewater systems, along with engineering and management consulting services and consumer water line protection plans. In 2007 UK-based Kelda Group sold control of Aquarion to Australia's Macquarie Bank for $860 million.

Energy Future Holdings (formerly TXU) has seen the future and it works -- powered by electricity. The company is the largest nonregulated retail electric provider in Texas (TXU Energy), with 2.1 million customers, and through its Luminant unit it has a generating capacity of more than 15,510 MW from its interests in nuclear and fossil-fueled power plants in the state. Energy Future Holdings has regulated power transmission and distribution operations through 80%-owned Oncor Electric Delivery. Oncor operates the largest regulated distribution and transmission system in Texas, providing power to more than 3.1 million electric delivery points over more than 117,000 miles of transmission and distribution lines.

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