pollution prevention Eliminating the production of hazardous wastes and greenhouse gases at their source, within the production process. This can often be achieved through a variety of relatively simple strategies, including minor changes in manufacturing processes, substitution of non-polluting products for polluting products, and simplification of packaging. Companies practicing waste reduction have saved hundreds of millions of dollars, and used it to catalyze employee involvement and eliminate the need for expensive end-of-the-pipe filtering