Shortage of water may become a more catastrophic problem than food or energy shortage according to experts. The problem affects developing as well as developed countries including the U.S.. For this month's LAB, we will look at how the corporate innovation method, S.I.T., can be used to address such a serious issue. The following ideas were developed by students at the University of Cincinnati working on the PUR water filtration system from Procter & Gamble. They are excellent examples of purpose-driven innovation. You can download the team's complete portfolio here.