While I can reduce the waste by flushing solids from the Feline Pine and corn based litter I use, I have no choice but to double bag in plastic bags for the rest - it's required by my waste disposal company. I do need to look into buy plastic bags that break down eventually. I've thought of putting the sawdust from the Feline Pine at the bottom of the garden, but it does retain urine smells and it would attract problems.