Which of the following statements is CORRECT?A. Wastes buried on landfills undergo aerobic decomposition that produce highly flammablebiogas.B. Leachate is a toxic liquid with various pollutants such as organic matter, heavy metalsand chemicals.C. Waste decomposes naturally and does not create shallow depressions.D. New landfills are located below the water table.E. Abandoned landfills can be converted into buildings
Question
Which of the following statements is CORRECT?A. Wastes buried on landfills undergo aerobic decomposition that produce highly flammablebiogas.B. Leachate is a toxic liquid with various pollutants such as organic matter, heavy metalsand chemicals.C. Waste decomposes naturally and does not create shallow depressions.D. New landfills are located below the water table.E. Abandoned landfills can be converted into buildings
Solution
The correct statement is B. Leachate is a toxic liquid with various pollutants such as organic matter, heavy metals and chemicals.
Explanation: A. This statement is incorrect. The decomposition that occurs in landfills is anaerobic (without oxygen), not aerobic. This process produces biogas, which can be flammable, but the decomposition process is not aerobic. C. This statement is incorrect. As waste decomposes, it can indeed create shallow depressions. This is because the volume of the waste decreases as it breaks down, which can cause the ground above to sink. D. This statement is incorrect. New landfills are not typically located below the water table. This is because it could lead to contamination of the groundwater. E. This statement is incorrect. While it is possible to repurpose land once a landfill has been properly closed and monitored, it's not typically converted into buildings due to the potential for ground instability and gas generation.
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