Clean Energy Fuels Corp. is a provider of clean fuel for the transportation market. The Company is a renewable energy company focused on the procurement and distribution of renewable natural gas (RNG) and conventional natural gas, in the form of compressed natural gas (CNG) and liquefied natural gas (LNG), for the United States and Canadian transportation markets. It sells RNG and conventional natural gas, in the form of CNG and LNG, as fuel for medium and heavy-duty vehicles. It is focused on developing, owning, and operating dairy and other livestock waste RNG projects and supplying RNG (procured from third party sources and from its anaerobic digester gas (ADG) RNG joint venture project with TotalEnergies S.E. (the DR JV)) to its customers in the heavy and medium-duty commercial transportation sectors. It also designs and builds, as well as operates and maintains (O&M), public and private vehicle fueling stations in the United States and Canada. It serves fleet vehicle operators.