National Propane Gas Association (NPGA) - Represents the U.S. propane industry, including small businesses and large corporations. The NPGA promotes safe and increased use of propane in a favorable environment and serves as the principal voice of the propane industry.

National Hydrogen Association - The NHA is leading the transition from a fossil fuel-based energy infrastructure to a hydrogen-based one. Membership includes representatives from the automobile industry, aerospace, federal, state, and local government and energy providers.

The Natural Gas Vehicle Coalition - Dedicated to the development of a growing, sustainable and profitable market for vehicles powered by natural gas or hydrogen.