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Landfill gases are a significant byproduct of the decomposition of organic waste in landfills, and their generation poses numerous hazards and health issues for both the environment and human populations. When organic materials such as food waste, garden waste, and paper products decompose under anaerobic conditions in a landfill, a mixture of gases is produced, primarily consisting of methane (CH₄) and carbon dioxide (CO₂), along with trace amounts of other volatile organic compounds (VOCs) such as hydrogen sulfide (H₂S), ammonia (NH₃), and various hazardous air pollutants. These gases can escape into the atmosphere or migrate through the soil, creating multiple hazards that affect air quality, human health, and even contribute to climate change. Methane is the most significant component of landfill gas because it is highly flammable and explosive. When methane concentrations reach a critical level within confined spaces or near ignition sources, there is a high risk of fire and explosions. This poses a direct physical hazard to people living near landfills, workers handling waste, and even surrounding communities. Methane is also a potent greenhouse gas, having a global warming potential many times higher than carbon dioxide over a short period. Its release contributes to climate change, which indirectly impacts human health by exacerbating extreme weather events, heatwaves, and air pollution levels. Carbon dioxide, another major component of landfill gas, while not flammable, poses a significant asphyxiation risk. In areas where gases accumulate in low-lying or poorly ventilated spaces, elevated CO₂ concentrations can displace oxygen, leading to suffocation and serious health ______ ______ _________ ____ ____.
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