why is methane production of concern at a landfill
6 Methane and Carbon Dioxide: Landfill gas is composed primarily of 50 percent methane and 50 percent carbon dioxide and other gases produced at less than 1 percent. Methane and carbon dioxide are generated through the biological decomposition of waste. Methane is naturally occurring flammable, colorless and odorless gas and is the principal explosive component of concern in landfill gas. Carbon dioxide is naturally found at low concentrations in the atmosphere. Carbon dioxide is colorless, odorless, and slightly acidic.