Waste to Energy is for residual waste the optimal treatment. In Amsterdam there have been four generations of Waste to Energy plants over the last one hundred years. By combining theoretical physics with experience from other power production methods, in Amsterdam a Waste Fired Power Plant was built in 2007. The two most crucial factors for the environment, high power production and extremely low emissions to air and water, have been combined in the waste fired power plant. The two most crucial factors for economic feasibility, high availability and a low total cost of ownership, have been combined in this technology. For any stakeholder in Waste to Energy, whether it is a government or a company, this technology is indispensable for its environmental and economic performance.