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What are landfill gases?

Question:
What are landfill gases?
Answer:
Landfill gas is formed in a landfill when biodegradable waste (such as food scraps, paper, and wood) rot and decompose (breakdown by bacteria) or evaporate. The gas is a mixture of mostly methane and carbon dioxide. It also contains several other gases in small quantities. The gas, if not properly contained within the engineered landfill, can seep out into the air and lead to unpleasant odours. The different gases that can make-up landfill gas vary depending upon the type of waste on a landfill site and how far the waste has broken down.

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