Landfilling is a method of waste disposal where refuse is buried between layers of soil. This process helps to manage waste in a controlled manner, reducing the risk of pollution and environmental hazards. Properly managed landfills can also capture methane gas, a byproduct of decomposition, which can be used as an energy source. However, landfilling poses significant environmental challenges, including the potential for groundwater contamination and the release of greenhouse gases. To mitigate these issues, modern landfills are designed with protective liners and monitoring systems to ensure safety and compliance with environmental regulations.