Manager of Landfill Operations (MOLO) Practice Test

One of the main concerns associated with putrescible solid waste in landfills is that it may produce methane gas when decomposing. Putrescible waste consists of organic materials, such as food scraps and yard waste, which are prone to rapid decomposition under anaerobic (low-oxygen) conditions commonly found in landfills. During this decomposition process, microorganisms break down the organic matter, leading to the production of methane, a potent greenhouse gas that has significant environmental implications.

Methane is not only a contributor to climate change but can also pose risks of explosion if it accumulates in confined spaces. Therefore, managing putrescible waste carefully is essential for minimizing methane emissions and ensuring safe landfill operations. This concern emphasizes the need for strategies such as gas collection systems to capture methane before it reaches the atmosphere, thereby mitigating its environmental impact.

The other options do not accurately represent the main concerns related to putrescible solid waste. For instance, putrescible waste is not easily recyclable, which makes disposal more pressing. It also does not require a high amount of energy for disposal, and it is not chemically inert, as it contains organic material that can undergo biological breakdown. Thus, option highlighting methane production accurately reflects a significant environmental issue that landfill operators must address.