How are landfills built?

Landfills are built by first selecting a suitable site and conducting environmental assessments. The area is then lined with impermeable materials, such as clay or synthetic liners, to prevent leachate from contaminating groundwater. Waste is deposited in layers and compacted to maximize space, while a cover is placed over the waste to minimize odor and pests. Finally, systems for managing leachate and methane gas are installed to ensure environmental safety and compliance with regulations.