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Which of the following is correct about pollution prevention methods as shown in the landfill diagram?

"Landfill Gas and Biogas." - Energy Explained, Your Guide To Understanding Energy. US Energy Information Administration, n.d. Web. 30 May 2016.


Clay is used because it is permeable to water.


Leachate is the gaseous byproduct of decomposition.


Ground water monitoring is necessary to ensure that liquid byproducts of decomposition do not reach aquifers.


Methane gas is added to the landfill to increase the rate of decomposition.


A leachate treatment system treats the gases before releasing them into the atmosphere.

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