Methods include advanced oxidation processing, distillation, adsorption, ozonation, vitrification, incineration, chemical immobilisation or landfill disposal. For some materials gasification can be an alternative to landfilling and incineration. Incineration or direct controlled burning of municipal solid waste to reduce waste and make energy. Starved air incineration is another method used to treat hazardous wastes. The final action is disposal, in landfills or through incineration without energy recovery. District heating will be carbon-neutral by 2025, by waste incineration and biomass. There are 28 waste incineration plants in the country. Many studies have been done concerning the gaseous emissions that result from the incineration process. The initial improvements were utilitarian, focusing on such aspects as sewage, incineration, and power generation. Controlled air is also known as starved-air incineration, two-stage incineration, or modular combustion. GFRPs hinder incineration and are not combustible. Firth supported completion of the Spadina Expressway and trash incineration. Construction began on the Consolidated Incineration Facility. Further measures included pouring boiling water over the grave or complete incineration of the body. Asbestos can be destroyed by ultra-high-temperature incineration.