"What is not well understood is the difference between water conservation and water efficiency. Conservation is like telling a motorist there is a shortage of fuel so he or she has to take fewer trips, whereas efficiency is like encouraging motorists to buy more fuel-efficient cars. In our view, water efficiency is the ethic we must embrace. Water conservation, on the other hand, is something we must do when there is a limited water supply. Extending the emergency regulations only perpetuates this fiction."