- Academy of Certified Hazardous Materials Managers (ACHMM)
- Aerospace Industries Association
- Air & Waste Management Association
- Allergan, Inc.
- Anheuser - Busch Companies
- Arizona Public Service
- Arizona State University
- Ashland
- AstraZeneca
- BHP Billiton
- BHP Corporate
- BHP Non-Ferris and Industrial Materials Group
- Bredero Shaw
- Con Edison
- Conference Board
- Council on Economic Priorities
- Cutter Consortium
- Dow Chemical Company
- Duke Energy
- Environmental Bankers Association
- Environmental Defense Fund
- Environmental Expert
- Exelon Generation Company
- Federal Mogul
- Framework:CR
- Frank Friedman & Associates LLC
- Freeport McMoRan Copper & Gold, Inc.
- GEMI (Global Environmental Management Initiative)
- Goodrich
- Granite Construction
- GreenBiz.com
- Halliburton Corporation
- Harvard Business School Publishing
- Harvard School of Public Heath
- Heinz North America
- Huntsman Chemical
- HSO Assessoria Em Saúde Ocupacional
- Johnson & Johson
- Kaiser Permanente
- Land O' Lakes
- Lockheed Martin Corporation
- Masco Corporation
- Merck & Company
- Michelin North America
- Minnesota Environmental Initiative
- Missouri Chamber of Commerce and Industry
- National Stone, Sand and Gravel Association (NSSGA)
- Newell Rubbermaid, Inc.
- NiSource
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- Northeast Utilities
- Organizations Resources Counselors
- Pacific Coast Gas Association
- PacifiCorp (Now Scottish Power)
- Pacific Gas & Electric
- Pharmaceutical Research and Manufacturers (PhRMA)
- PPG Industries
- PPL Corporation
- SBC Communications, Inc.
- Schering-Plough Corporation
- Semiconductor Equipment and Materials International (SEMI)
- ShawCor Ltd.
- Southwest Gas Corporation
- Stevens Publishing
- Teichert, Inc.
- Textron Inc.
- Tufts University
- United Defense
- WEST (Western Energy Supply & Transmission)
- Western Energy Institute
- Williams
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