Answer:
Step-by-step explanation:
An engineered cover on landfills can reduce the decomposition of trash by creating a barrier between the waste and the environment. Here are a few ways in which an engineered cover can help:
1. Gas Management: Landfills produce gases such as methane as the waste decomposes. An engineered cover can include gas collection systems that capture and control these gases, preventing their release into the atmosphere. By managing the gas buildup, decomposition processes can be slowed down.
2. Moisture Control: Decomposition requires moisture. An engineered cover can include liners or barriers that limit the infiltration of water into the landfill. By reducing moisture levels, the activity of decomposing microorganisms can be inhibited.
3. Oxygen Limitation: Decomposition processes typically require oxygen. By designing the cover to limit oxygen infiltration, anaerobic conditions can be created. This can slow down decomposition as anaerobic bacteria, which decompose waste more slowly, dominate the environment.
4. Minimizing Leachate Generation: Leachate refers to the liquid that forms as water percolates through the waste. An engineered cover can help minimize leachate generation by incorporating liners and drainage systems that collect and redirect leachate for proper treatment and disposal. By reducing leachate, the conditions for decomposition can be less favorable.
5. Physical Barrier: The cover itself acts as a physical barrier, preventing direct contact between the waste and external elements. This reduces the availability of nutrients, moisture, and oxygen that are necessary for decomposition.
By implementing these strategies, an engineered cover on landfills can effectively reduce the decomposition of trash and mitigate its environmental impacts.