Advancements in waste-to-energy (WTE) technologies play a pivotal role in reducing landfill waste and decreasing greenhouse gas emissions. WTE technologies convert municipal solid waste into usable energy, such as electricity, heat, or fuel, through processes like incineration, gasification, and anaerobic digestion. By diverting waste from landfills, these technologies significantly reduce the volume of waste that would otherwise contribute to land degradation and pollution. In landfills, organic waste decomposes anaerobically, releasing methane—a potent greenhouse gas with a global warming potential much higher than carbon dioxide. WTE technologies mitigate this by capturing the energy potential of waste before it decomposes, thus preventing methane emissions. For instance, incineration reduces waste volume by up to 90% while generating electricity, and advanced gasification converts waste into syngas, which can used for power generation with lower emissions. Furthermore, WTE reduces reliance on fossil fuels by providing a renewable energy source, contributing to a decrease in carbon dioxide emissions from traditional power plants. Modern WTE facilities are designed to operate with high efficiency and strict emission controls, minimizing pollutants. By integrating WTE technologies into waste management systems, cities can achieve more sustainable waste disposal practices, reduce landfill dependency, and contribute to global efforts in combating climate change.