Why do we bother conserving water?

Most water is not cleaned..most ends up in the ocean. Yes, some is cleaned and used for agricultural purposes..but drinking water is limited..only 1% or all the water on earth can be used for drinking. Once your water goes down the drain it will never be used in that capacity again. Also water treatment plants take a lot of time, money and energy to run, so conserving water not only saves water, but also time, energy and money and other resources!