There are several biodegradable cat litters available if you want to be a green person. One of them is even made of recycled newspaper! Use baking soda to control odour. Avoid throw-away liners. They are not necessary. Washing the litter box regularly will keep it fresh. From 2 minutes a day for a Greener Planet.
for pet accidents: for dog or cat urine, immediately mix a solution of 2 tsp. dish soap and cool water. Froth it up and blot the area well with the foamy lather. Wash off with a mixture of white vinegar and water (one part vinegar to 8 parts water). Make sure you dry the area immediately with a hairdryer set on cool or even a small fan. From: Haley’s Cleaning Hints.