Related: Environment

1. More environment
   1. Fracking boom triggers water battle in North Dakota
   2. Buggy hordes of cicadas sighted in Virginia
   3. Melting glaciers contribute to rising ocean levels
   4. Food supply under assault as climate heats up
   5. Crocodile's suspicious death sparks $6,000 reward
2. More U.S. news
   1. Oklahoma tornado kills 51, including 20 kids
   2. Trapped students had nowhere to hide from tornado
   3. More 'devastating' tornadoes possible Tuesday
   4. KFC cook records dramatic footage of monster storm
   5. Scientists study Tornado Alley's past and future
3. Related videos
   1. 
      Video
      Massive tornado hits Moore, Ok.
   2. 
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      Parade permits allow radioactive waste moves
   3. 
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      Superstorm Sandy victims encouraged to sell homes
   4. 
      Video
      Melting glaciers contribute to rising ocean levels