Simple Green Outdoor Odor Eliminator removes nasty smells left behind by animal urine, stool, vomit and other organic matter. This formula uses powerful, natural enzymes to eliminate odors at the source, rather than just covering them up. Works great on grass, turf, gravel, concrete, decks, patios, dog runs, kennels, and more. Leaves behind a fresh, clean scent. Optimized for use around pets.