RNG (Renewable Natural Gas)  RNG, also known as biomethane, is a gaseous alternative fuel made from decomposing organic materials—such as waste from landfills and livestock—and is primarily composed of methane. It is odorless and must be compressed in a gasification process for use in heavy equipment and transportation vehicles. The biogas used to produce RNG is conditioned and purified by way of a process called anaerobic digestion.  It is a pipeline-quality fuel product that is being adopted within many transport and heavy equipment fleets as they transition to renewable fuels.

Differences between CNG & RNG— Though RNG is chemically identical to conventional natural gas, RNG is not a fossil-derived fuel. It is produced through a completely renewable process that captures methane emissions from organic waste. Depending on feedstock, RNG has a very low lifecycle carbon intensity when compared to diesel.