I was pleasantly surprised with BioKleen (http://biokleenhome.com/pets/which is environmentally safe. Picked it up to try it out when I needed something quick and ended up being a favorite. It has a pleasant smell too. I found it at my local Krogers/Frys. But my long-time favorite that wipes out all smells is Mister Max Anti-Icky Poo http://www.antiickypoo.com/Original-Anti-Icky-Poo. Not sure if it is "environmentally-safe" though. You can find it at Home Depot or online on Amazon.