Every year over $100 Billion dollars is spent on bottled water world-wide.
The United Nations estimates that if given just 1/6th of that money for one year, $15 billion, they could cut in half the number of people without access to clean water.
Take the Water Challenge. Just give up all drinks EXCEPT water for two weeks. Drink tap water. Take all the beverage money you save and donate to the Water Project to help fund a project that will build wells for schools in developing countries.