If we are to tackle the challenges of future populations on the planet, we will need to insure adequate water supply. Our US population is growing, by one person every nine seconds and with this growth the consumption of fresh water increases. The average person uses 80-100 gallons per day in the US. In Third world countries about 4-8 total gallons of water per day. I have tested this myself, it is possible to do this;

http://www.carwashguys.com/082902_2.shtml

We need to start a World Wide Campaign about the importance of water by teaching kids the facts and making sure they understand the needs for these infrastructures in the future. Too many areas are expanding rapidly in desert regions, without sustainable water resources, where population explosions move into neighborhoods and put in lawns. In these areas 40% of the residential water use is expended outside the home.

These same issues were a major concern of the ancient Indian cultures who lived on these lands before us. Just like other Indian Cultures in Central and South America, the indigenous people of Australian outback, as well as the water ways and canals built by the Greeks, Romans, Egyptians. Worldwide drought issues will be a problem in the next two decades with an estimated 2.5 billion people without proper fresh water supplies. We must launch our world wide campaign now to promote conservation, proper sewage treatment and empowering peoples to secure and build facilities to insure they will not be without water as the climate changes and leaves whole regions of the world without.