Image sources:

• – Peeing Out of an Avalanche:
  http://www.sogoodblog.com/wp-content/uploads/2008/01/anheuser_busch_beer.jpg
• – Trapped Miners Survived on Pee:
  http://cache.daylife.com/imageserve/0evegFu6nV0Jb/340x.jpg
• – Pee as an Alternative Power Source in Battle:
  http://www.treehugger.com/metalcellphoto2.jpg
• – Hiker Survived on an All Pee Diet:
  http://s0.fast-sfc.com/resortphotos1/Picos-De-Europa.jpg