What are some basic construction elements of a landfill?

The correct answer consists of essential construction elements that are crucial for the effective and safe operation of a landfill. These elements include the bottom liner, which serves as a barrier to prevent contaminants from leachate, a byproduct of waste decomposition, from entering the groundwater. The leachate collection system is vital for capturing this liquid waste, ensuring that it can be effectively treated and managed rather than allowing it to seep into the surrounding environment. Additionally, the landfill gas collection system is necessary for collecting gases produced during waste decomposition, such as methane, which can pose safety hazards or be harnessed as an energy source. Finally, the final cover system is important for stabilizing the landfill and preventing erosion, as well as minimizing water infiltration and environmental impact post-closure. All these components work together to ensure that the landfill operates safely and in compliance with environmental regulations, protecting both public health and the surrounding ecosystem.