How would banning new oil wells help protect our water supplies and purity?

A:

Oil extraction practices, especially extreme ones like steam injection, fracking, use of exotic chemicals, acids, and gasses, pose serious threats to our surface and groundwater resources.  Both the large amount of water which is used (in Price Canyon 22 barrels of water for every barrel of oil recovered) and the underground disposal of toxic water threaten both water quantity and quality.  Much of the water used to produce oil could be used for beneficial uses by municipalities or farmers.  Bottom line, we need potable water more than we need dirty, heavy crude oil which is primarily exported to Asia.