Moving grate incinerators are sometimes referred to as Municipal Solid Waste Incinerators (MSWIs). Starved air incineration is an improvement of the traditional incinerators in terms of air pollution. These devices have been used on medical waste incinerators and a few municipal waste combustors. Municipal solid waste incinerators also normally include flue gas treatments to reduce pollutants further. Refractory materials are used in furnaces, kilns, incinerators, and reactors. These regulations succeeded in reducing dioxin stack emissions from incinerators. These devices have been used on industrial and utility boilers and municipal waste incinerators. The goal is for no trash to be sent to landfills, incinerators, or the ocean. Inconel is increasingly used in the boilers of waste incinerators. Japan burns close to two thirds of its waste in municipal and industrial incinerators. This material is discharged from the moving grate of municipal solid waste incinerators. Other commercial facilities include waste incinerators which have built-in material recovery. The three type of medical waste incinerators are controlled air, excess air, and rotary kiln. Most of the improvement in U.S. dioxin emissions has been for large-scale municipal waste incinerators. Many small incinerators formerly found in apartment houses have now been replaced by waste compactors.