HOW IT WORKS: A MODERN “ENERGY-TO-WASTE” INCINERATOR Trash can be burned at very high temperatures in incinerators (some of which are designed to also generate electricity). In modern facilities, cleaning systems remove particulates, sulphur, and nitrogen pollutants, as well as toxic pollutants like mercury and dioxins. The ash is considered toxic waste and must be buried in hazardous waste landfills. Municipal solid waste, medical waste, and some hazardous waste are incinerated in Canada.