Sponsoring companies to date

• 3M
• Anheuser Busch Companies
• Arizona Public Service
• Ashland
• Atmos Energy
• BHP Billiton
• Bristol-Myers Squibb
• Clean Harbors Environmental Services
• Consolidated Edison
• Cytec Industries, Inc.
• Duke Energy Corporation
• Lockheed Martin
• Ontario Power Generation
• Pacific Gas & Electric
• United Technologies
• Weyerhaeuser
• Williams Companies