Waste to energy (WTE) technologies play a pivotal role in addressing the dual challenges of waste management and energy production. By converting various types of waste, such as municipal solid waste, biomass, and industrial residues, into usable energy, these technologies contribute to sustainable resource utilization. WTE processes include incineration, gasification, and pyrolysis, each offering unique advantages. Incineration involves burning waste at high temperatures, producing heat and electricity. Gasification transforms organic materials into a synthetic gas for power generation or biofuel production. Pyrolysis breaks down waste into bio-oil, gas, and char, fostering a diverse energy output. These technologies not only reduce the volume of waste in landfills but also mitigate environmental impacts, such as greenhouse gas emissions. Additionally, WTE helps diversify energy sources, promoting a more resilient and sustainable energy infrastructure. Despite their benefits, WTE technologies face challenges like public perception concerns and the need for strict emissions control. Advancements in clean combustion and emission reduction technologies are crucial for enhancing WTE's environmental performance. WTE initiatives align with the circular economy, emphasizing the recovery of resources from waste streams. Governments and industries worldwide are increasingly recognizing the potential of WTE to contribute to a cleaner and more energy-efficient future.