As there is limited water resource of fresh water, we can save the water in many cases like of bathing by limiting the use of water in collages. A system should be made where each student is provided a certain amount of water for bathing. A account system can be made where when ever a student goes for bathing he enters his registration number and the water used by him should be calculated. By this way we can prevent excess and useless wastage of water.
Idea No. 213