The United States Geological Society estimates that 85 percent of the 2.54 million tons of clay used in this country every year is used for absorption of pet waste, with cat litter being the dominant. There are about 20 companies operating such mines in 10 states.We've been using pine pellet litter for quite awhile now and I can highly recommend it. It absorbs the ammonia smells much better than clay and also naturally absorbs wetness as part of how it works to break down into smaller pieces, which means you have less waste to scoop each time you clean it. It's also made from a byproduct of wood industries.
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posted by BobbyVan at 12:50 PM on September 29, 2008 [4 favorites]