Flush with care – An average toilet uses about 3-5 gallons of water per flush. Combine that with multiple flushes during the day and your water bill can sky rocket. But a company called Clivus Multrum has come up with a solution to help conserve water use in the home and business.
*Foam flush toilet- Use biodegradable soap and water to flush waste with only 3oz. of water- a tremendous reduction over the conventional toilet. The waste is carried to a composting tank that breaks it down with bacteria. The finished mass can be used as plant fertilizer, another added bonus and more savings.
http://www.clivusmultrum.com/products_foam_flush.shtml