LACKLAND AIR FORCE BASE, Texas -- Bob Nelson with San Antonio's CPS Energy gives tips on how to conserve energy at home April 20 during the fourth and final in the series of San Antonio Armed Forces 2011 Earth Day brown bag information lunches. Mr. Nelson suggested simple things to do such as keeping showers short and reducing the temperature of water heaters. More helpful hints are available at http://www.cpsenergy.com/. Air Force photo by Armando Perez
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