The August 2008 issue of Scientific American has a good article on the water crisis, an includes a number of suggested solutions. One major point stood out for me, and it is the same point that is currently made about renewable energy sources: We are in need of large scale storage facilities for both water and energy. We obtain, from nature, many times more fresh water and solar/wind energy than we need, but we lack storage facilities which would allow us to match supply to demand. Nature has never been particularly predictable and now, with global warming affecting the weather patt4erns, it is much less so. Much of our forecasting is based on models which are statistical references to the past, but the probability of the future resembling the past (in the area of wind, water, and insolation) has greatly diminished. This only makes solving storage problems more difficult. However, it doesn't change the fact that storage capacity is the most important future issue for both fresh water and energy.