The collection, distribution, and treatment of drinking water andwastewater nationwide consume tremendous amounts of energy and releaseapproximately 116 billion pounds of carbon dioxide (CO2) per year—asmuch global warming pollution each year as 10 million cars.1 The energywaterconnection is particularly strong in the driest regions of the UnitedStates, such as the Southwest, where significant amounts of energy are usedo import water. Solutions exist to cut both water and energy use. Throught water efficiency measures, we can help to protect dry areas from drought,lower consumers’ utility bills, and reduce global warming pollution.