1) AMERICAN PUBLIC GAS ASSOCIATION

2) APEX CLEAN ENERGY, INC

3) ARKEMA INC.

4) CALIFORNIA RECYCLING ALLIANCE

5) CONSUMER TECHNOLOGY ASSOCIATION

6) DRAX BIOMASS INC.

7) EASTMAN CHEMICAL COMPANY

8) EATON CORPORATION

9) LANXESS CORPORATION

10) LINDE INC.

11) MARATHON PETROLEUM COMPANY LP

12) NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION

13) NATIONAL READY MIXED CONCRETE ASSOCIATION

14) QUINTESSENCE MARINE INC. D/B/A INVERSA LEATHERS

15) STE NORTH AMERICA INC. (FORMERLY ST ENGINEERING NORTH AMERICA, INC.)

16) SYENSQO USA LLC

17) TETHER OPERATIONS, S.A. DE C.V.

18) TETRA PAK INC.

19) THE PROCTER & GAMBLE COMPANY

20) WESTMORELAND MINING LLC