What is released during decompostion in landfills that contriubutes to poor air quality?

During decomposition in landfills, organic waste breaks down anaerobically, producing methane, a potent greenhouse gas that contributes to poor air quality. Additionally, the breakdown of waste can release volatile organic compounds (VOCs) and other harmful gases, such as hydrogen sulfide, which can exacerbate air pollution and create health hazards. These emissions not only affect the immediate vicinity of the landfill but can also contribute to broader environmental issues.