what type of gas is released in landfills (methane or co2
Landfill gas is a complex mix of different gases created by the action of microorganisms within a landfill. Landfill gas is approximately forty to sixty percent methane, with the remainder being mostly carbon dioxide. Trace amounts of other volatile organic compounds (VOCs) comprise the remainder (< 1%). These trace gases include a large array of species, mainly simple hydrocarbons.