If there is anything that qualifies to be called a life-giving force then they are air, water and light. The histroy of our mess with air with pollution is well known now. Another tragedy creeping up on us is the crisis of water. Water is the next BIG commodity everybody will fight over. For the urban people who are fed on pumped water the maganmity of the issue is never evident. There fore it is good to remind ourselves that a drop saved is a good thing indeed. Blue Planet and Amazon have giving a E-book for free. A very good book and worth referencing. You can download the book from Amazon. Blue Planet Run (http://blueplanetrun.org/the_book)