Deep inside landfills, bacteria decompose organic wastes in a low oxygen environment. This anaerobic decomposition results in a mix of gases called landfill gas, which consists of about 50% ________________.

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Methane is the primary component of landfill gas, accounting for around 50%. The other components include carbon dioxide, nitrogen, and trace amounts of other gases such as hydrogen, oxygen, and nitrogen oxides.

Deep Inside Landfills, Bacteria Decompose Organic Wastes in a Low