This challenge is from http://studentchallenge.edublogs.org/2010/03/21/march-2010-challenge-4/ . Today is world water day, I never know that before today. The reason that it is world water day is because a long time ago someone brought up that 1.1billion people had unsafe drinking water. They have this day so people know what water is safe and what water isn't. Something I could do to help out the Earth is I could stop buying plastic water bottles. Think of something you could do?