Methane Gas is a gas produced by anaerobic biodegradation. In a landfill the gas which is produced is 50% methane gas and 50% co2 with various other organic compound off-gases(VOC’s). The VOC’s are regulated when off-gassed and many organizations are reducing the VOC content of their landfills.
Extremely flammable. Not toxic. Asphyxia may result if the oxygen concentration is reduced to below about 16% by displacement.