Manage water use in Toilet

Process of Elimination
Low-flow toilets can save a lot of water. They use a maximum of 1.6 gallons per flush, compared with five gallons or more for an older toilet. Another option is a dual-flush toilet operated by two buttons: Push the No. 1 button, and the toilet dispenses less than a gallon of water to whisk away liquid waste. Push No. 2 and the toilet releases the full 1.6 gallons to flush solid waste. Widely used in Europe and Australia, dual-flush toilets are catching on in the U.S. (Court:SciAm)