A method of recycling building materials is described, including the steps of introducing the building material into a cement kiln or a boiler, and combusting a combustible portion of the building material as a fuel within the kiln or boiler. The noncombustible portion of the building material is incorporated into a clinker material within the kiln or used to reduce emissions form the boiler.

 
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< Cleaning unit, process cartridge, and image forming apparatus

< Polymer blends comprising low molecular weight nitrile rubber

> Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells

> Built-in low-glare light fixtures recessed in ceilings and walls
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