DGP Heavy Duty Degreaser offers superior performance compared to standard petroleum based products. It is made with American grown citrus terpenes, biodegradable, and is USDA BioPreferred. This degreaser is designed from renewable resources providing remarkably lower carbon footprint, increased user safety and overall highest environmental benefit possible. DGP cleaners are part of a next generation family of innovative and responsible products from DGP. Don't let the fact that we are green make you think we are not tough. Our Green Shield certified testing makes sure of that.