<P> The European Union has legislation regarding waste management and landfill sites called the Landfill Directive . </P> <P> Countries such as the United Kingdom and Germany now have legislation in force that provides farmers with long - term revenue and energy security . </P> <P> The United States legislates against landfill gas as it contains VOCs . The United States Clean Air Act and Title 40 of the Code of Federal Regulations (CFR) requires landfill owners to estimate the quantity of non-methane organic compounds (NMOCs) emitted . If the estimated NMOC emissions exceeds 50 tonnes per year, the landfill owner is required to collect the gas and treat it to remove the entrained NMOCs . Treatment of the landfill gas is usually by combustion . Because of the remoteness of landfill sites, it is sometimes not economically feasible to produce electricity from the gas . </P> <P> With the many benefits of biogas, it is starting to become a popular source of energy and is starting to be used in the United States more . In 2003, the United States consumed 147 trillion BTU of energy from "landfill gas", about 0.6% of the total U.S. natural gas consumption . Methane biogas derived from cow manure is being tested in the U.S. According to a 2008 study, collected by the Science and Children magazine, methane biogas from cow manure would be sufficient to produce 100 billion kilowatt hours enough to power millions of homes across America . Furthermore, methane biogas has been tested to prove that it can reduce 99 million metric tons of greenhouse gas emissions or about 4% of the greenhouse gases produced by the United States . </P>

One of the major constituent of gobar gas is