It has long been known by geologists that the world's oil supply is finite. Oil is not a renewable resource and it is found in relatively limited geological environments around the world. This is the subject of Beyond Oil, The View from Hubbert's Peak, by Kenneth S. Deffeyes, Professor Emeritus at Princeton University published in 2005, (202 pages, hardcover, Hill & Wang).

Water suppliers are under an increased threat of terrorism. Documents captured in Afghanistan after the 911 attack show that Al Qaeda was very interested in United States water supply systems. These systems are still very vulnerable in several ways.

Many experts seem to be thinking that the probability of a terrorist attack on one of our nation's water supply systems is very low.