Trojan Technologies wants to zap you. The company manufactures ultraviolet (UV) lighting systems for disinfecting wastewater and treating contaminated soil and groundwater. Trojan's wastewater treatment systems are used in about 4,000 municipalities in 50-plus countries. The company's UV light systems work by altering the DNA in microorganisms and are an alternative to traditional chlorine-based disinfection systems. Trojan also makes UV products that cleanse water used in industrial processes such as food production and electronics manufacturing. Other products include residential UV systems for drinking water. Danaher controls Trojan.

Energieversorgung Weser-Ems (EWE) is a German powerhouse. Operating through some 30 subsidiaries and associated companies, EWE is a multi-service energy company primarily involved in distributing natural gas and electricity. In the past few years, however, EWE has expanded its activities to include telecommunications and information technology. EWE is Germany's fifth-largest energy company, serving more than one million electricity customers and providing about 770,000 customers with natural gas. Subsidiary EWE NaturWatt sells electricity exclusively from renewable sources. In 2008, German electricity distributor EnBW agreed to buy 26% of EWE for just more than $3 billion.

Guangzhou Development Industry helps keep the lights on in China's Pearl River Delta. Established in 1997, the company is the largest power producer in Guangzhou province, with stake in about 10 coal-fired power plants with 2,100 MW of generating capacity. Guangzhou's energy logistics division operates an 80,000-ton deep-water coal-loading terminal and a 340,000-ton coal storage field. Nansha Oil Terminal, its joint venture with BP, has expanded Guangzhou's oil products distribution services throughout the region. The company is also a shareholder in Guangzhou Northern No. 2 Ring Expressway, a key toll road operating in the Pearl River Delta

Created by Texas ranchers and business owners, Pedernales Electric Cooperative provides electricity services in the Texas Hill Country. The company, the largest electric cooperative in the US, purchases its electricity from wholesale providers, primarily the Lower Colorado River Authority (LCRA), and transmits and distributes it to more than 234,000 customers. The member-owned cooperative is purchasing wind-power assets from American Electric Power to expand its green energy sources. In 2008 a scandal over alleged inappropriate expenditures by board members led to the resignation of the board president and intense scrutiny of the co-op by the public, members, and the government. Created by Texas ranchers and business owners, Pedernales Electric Cooperative provides electricity services in the Texas Hill Country. The company, the largest electric cooperative in the US, purchases its electricity from wholesale providers, primarily the Lower Colorado River Authority (LCRA), and transmits and distributes it to more than 234,000 customers. The member-owned cooperative is purchasing wind-power assets from American Electric Power to expand its green energy sources. In 2008 a scandal over alleged inappropriate expenditures by board members led to the resignation of the board president and intense scrutiny of the co-op by the public, members, and the government.

EQT Corporation, together with its subsidiaries, operates as an integrated energy company in the United States. The company operates in three segments: EQT Production, EQT Midstream, and Distribution. The EQT Production segment engages in the exploration, development, and production of natural gas and crude oil in the Appalachian Basin. This segment’s properties are located primarily in Kentucky, West Virginia, Virginia, and Pennsylvania. As of December 31, 2009, it had 4.1 trillion cubic feet of proved reserves across 3.4 million acres. The EQT Midstream segment provides gathering, processing, transmission, and storage services to third parties in the Appalachian Basin. It has approximately 10,650 miles of gathering lines and 970 miles of transmission lines. The Distribution segment engages in the distribution and sale of natural gas to residential, commercial, and industrial customers in southwestern Pennsylvania, West Virginia, and eastern Kentucky. This segment served natural gas to approximately 275,900 customers comprising of 257,300 residential, and 18,600 commercial and industrial customers. The company was formerly known as Equitable Resources, Inc. and changed its name to EQT Corporation in February 2009. EQT Corporation was founded in 1925 and is headquartered in Pittsburgh, Pennsylvania.

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.

AGL Resources Inc., an energy services holding company, distributes natural gas primarily in Florida, Georgia, Maryland, New Jersey, Tennessee, and Virginia. It operates in four segments: Distribution Operations, Retail Energy Operations, Wholesale Services, and Energy Investments. The Distribution Operations segment operates six natural gas distribution utilities that construct, manage, and maintain intrastate natural gas pipelines and distribution facilities. It operates approximately 46,000 miles of underground distribution and transmission mains. The Retail Energy Operations segment markets natural gas and related services under the Georgia Natural Gas name to retail customers on an unregulated basis primarily in Georgia, Ohio, and Florida, as well as to commercial and industrial customers principally in Alabama, Tennessee, North Carolina, South Carolina, and Georgia. The Wholesale Services segment involves in asset management and optimization, storage, transportation, production, and peaking services, as well as engages in wholesale marketing business.The Energy Investments segment develops, acquires, and operates salt-dome and other storage assets in the Gulf Coast region of the United States. It has approximately 7.5 billion cubic feet of liquefied natural gas (LNG) storage capacity in five LNG plants located in Georgia, New Jersey, and Tennessee, as well as owns three propane storage facilities in Virginia and Georgia. AGL Resources Inc. has a joint venture agreement with TECO Energy Inc. to provide home warranty products and services under the brand name UtiliPRO; and with El Paso Corp. to distribute liquefied natural gas (LNG) across the southeastern United States to the heavy-duty transportation market. AGL Resources Inc. was founded in 1856 and is based in Atlanta, Georgia.

Società Azionaria per la Condotta di Acque Potabili provides non-potent potables for Italian citizens and industrial plants. Acque Potabili provides water services to more than 100 municipalities in the country, which have more than 800,000 residents combined; its water distributors include Acquedotto Monferrato and Acquedotto di Savona. Italgas, which is controlled by energy conglomerate Eni, owned a 67% stake in Acque Potabili, but has since sold it to Azienda Mediterranea Gas e Acqua (AMGA) and Società Metropolitana Acque Torino (SMAT). The company's other major shareholders include Vivendi (14%) and ACEA (14%).

American Labelmark wants to take some of the danger out of hazardous materials. The firm's Labelmaster division sells books, training manuals, and protective equipment (such as steel salvage drums and spill kits) to companies that transport hazardous materials, helping them navigate the maze of government rules. It also makes labels and signage for hazardous materials and infectious waste transportation, along with labels concerning workplace safety and ergonomics. Its Reg-Trieve software division sells compliance materials on compact disks. American Labelmark also offers regulatory information online.

Alpheus Environmental finds answers in a range of environmental-related services: water and wastewater treatment, operations and maintenance, infrastructure management and contracting, waste management and recycling, and technical support. A unit of water utility group AWG (formerly Anglian Water), it offers design, build, and project management services for blue-chip companies in the process industry. Services include installing water, gas, electricity, roads, and sewers on development sites. Customers include TOTAL, Whitbread, and the Derby City Council. Alpheus Environmental manages water management, waste minimization, and recycling sites across the UK.

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