Answer : A
Answer : B
Answer : B
Answer : C
Answer : C
Answer : A
Answer : C
Answer : A
Answer : D
Answer : B
Answer : B
Answer : B
Answer : D
Answer : C
Landfill gas (LFG) is a natural by product of the decomposition of organic material in landfills. LFG is composed of roughly 50 percent methane (the primary component of natural gas), 50 percent carbon dioxide (CO2 ) and a small amount of non-methane organic compounds
Answer : C
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