Landfilling stands as a prevalent method for eliminating and discarding waste materials, serving as the ultimate step in managing municipal solid waste. The practice of disposing of municipal solid waste through landfills has emerged as a significant global environmental concern, leading to environmental pollution and contamination. Microorganisms within the landmass interact with the deposited materials, breaking down the organic substances present. The leachate produced by landfills contains a mix of organic, inorganic, and suspended particles, posing potential threats to ecosystems. These pollutants found in leachate encompass heavy metals, organic and inorganic matter, as well as organic compounds. The characteristics of soil are altered as leachate migrates, impacting its geological properties. The physical, chemical, and biological properties of the waste materials are influenced by the decomposition processes and microbial activity. Emissions of trace gases can result from the volatilization of chemical substances, waste material degradation, and conversion reactions. The released gas concentration varies based on the dumping region, whether the materials are covered or uncovered. This review suggests an engineered landfill design aimed at generating landfill gas that could potentially replace fossil fuels, serving as compressed natural gas or liquefied natural gas. The landfill area is partitioned into organic and inorganic cells, focusing on energy generation and resource recovery goals. However, a thorough analysis of the impact of these emitted gases is still pending.