Biogas typically refers to a gas produced by the biological breakdown of organic matter in the absence of oxygen increase gas mileage. Biogas is comprised primarily of methane and carbon dioxide. Biogas originates from biogenic material and is a type of biofuel. Biogas is a product of the anaerobic digestion or fermentation of biodegradable materials increase miles per gallon such as manure or sewage, municipal waste, and energy crops fuel saver.

The methane in biogas gives it the ability to be used as a fuel. The combustion of fuel saver which releases energy. In developing countries biogas can be used as a low-cost fuel for cooking. It can also be utilised in modern waste management facilities where it can be used in gas engines to generate electricity. Biogas is a renewable fuel and electricity produced from it can be used to attract renwable energy subsidies in some parts of the world.

Depending on where it is produced, biogas can also be called swamp, marsh, landfill, increase gas mileage or digester gas. A biogas plant is the name often given to an anaerobic digester that treats farm wastes or energy crops.

Biogas can be produced utilising anaerobic digesters. These plants can be fed with energy crops such as maize increase miles per gallon silage or biodegradable wastes including sewage sludge and food waste.

Landfill gas is produced by organic waste decomposing under save gas anaerobic conditions increase gas mileage in a landfill. The waste is covered and compressed mechanically and by the weight of the material that is deposited from above. This material prevents oxygen from accessing the waste and anaerobic microbes thrive. This gas builds up and is slowly released into the atmosphere if the landfill site has not been engineered to capture the gas. Landfill gas is hazardous for three key reasons. Landfill gas becomes explosive when it escapes from the landfill and mixes with oxygen within lower and higher explosive limits. The methane in biogas forms explosive mixtures in air. The lower explosive increase miles per gallon limit is 5% methane and the upper explosive limit is 15% methane. The methane contained within biogas is 20 times more potent as a greenhouse gas than carbon dioxide. Therefore uncontained landfill gas which escapes into the atmosphere significantly contributes to the effects of global warming fuel saver. In addition to this volatile organic save gas compounds (VOCs) contained within landfill gas contribute to the formation of photochemical smog.