There is an English saying that says, "If its yellow let it mellow. If it's brown flush it down." This was first introduced in New York during the 1980s because of a water shortage. The truth is that the entire world is in a water shortage. Depending on toilet to toilet, usually, a flush will require 1.6 gallons (6 liters) of water. Using that much water on such a small and insignificant amount of waste Is not necessary. This can easily be dealt with by not flushing our urine. If everyone follows this strategy, it can save millions of gallons of water. 

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How it saves money: By using less water, water bills will go down. It is as simple as that.