Water is one the most vital resources on the planet. Humans can live for weeks without food but only a few days without water. We cook with it, swim in it, and fish in it. Yet we humans often abuse water. We taint it with chemicals and human sewage. Water is more precious to us than gold, and yet we often waste it. As our population grows, there may not be enough freshwater to go around. The countries of North America have always had plentiful natural...