water and life
As humanwe should know it is so important that the water for us.about 70% composition of a person's body is water.and we can leave off food to live for long time(at least 7 days) but not more than 72 hours we will die if we leave the water.the reality now days is the resources of water lacked day by day .this require us must save in useing water.how to do it? in public bathroomwe..