TP25-27 Environmental Consequences of Evaporative Cooling RestrictionsIn the face of the most severe drought in 1,200 years, local authorities in Las Vegas and Henderson, Nevada have restricted the use of evaporative cooling systems in the name of conservation. Proponents of the moratorium cite the severe drought involving the Colorado River which supplies ninety percent of the water to southern Nevada while urging that businesses should convert water guzzling evaporative cooling systems to mechanical air conditioning