I generally use plastic bags to scoop out clumped up bits of litter each day, but it occurs to me that that is a very BAD THING in terms of my contribution to the sea of plastic that ends up in the oceans killing wildlife etc. Wondering about finding a greener solution - does anyone know if there is such a thing as a biodegradable plastic bag? I usually recycle mine, but clearly can't when full of cat litter.....