Shenzen Keys Two (image) Colorado State University Share Print E-Mail Caption Researchers found that 19 of 29 large cities depend on evaporation from surrounding lands for more than one-third of their water supplies. Pictured here is Shenzen, China. Credit Patrick W. Keys/Colorado State University Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.