National Geographic : 2010 Apr
FOR SUBSCRIPTIONS, GIFT MEMBERSHIPS, OR CHANGES OF ADDRESS, CONTACT CUSTOMER SERVICE AT NGMSERVICE.COM, OR CALL 1 800 NGS LINE 647 5463 . OUTSIDE THE U.S. AND CANADA PLEASE CALL +1 813 979 6845. departments on the Cover Drops spritzed from a spray bottle landed on Formica for their close-up. Photo by Mark Thiessen geography Journey to the Bottom of the Spigot In every country, there's a different story about how water reaches the faucet. HEALTH Wash Away Germs Scrubbing with soap for at least 20 seconds could save millions of lives. SPACE Water’s out there The closer we look, the more water and ice we discover beyond Earth. teChnology Big Dipper The world's largest pool has white sand, sailboats, and 66 million gallons of water. sCienCe Up a Slippery Slope The same energy that clumps cereal together in milk helps a bug scale a watery curve. THE BIG IDEA get the salt out 32 Desalination plants will soon add billions of gallons a day to the drinking supply. editor’s note 4 Letters 8 your shot 12 visions of earth 14 Inside Geographic 178 Flashback GeoPuzzle Special Thanks The magazine thanks the Howard G. Buffett Foundation, the Honorable Marilyn Ware, and the members of the National Geographic Society for their generous support of this issue. It is also grateful to the many NGOs and experts who shared their frontline knowledge of the water crisis with us.