Groundwater withdraw issues in Cali 
http://news.nationalgeographic.com/news/2014/08/140819-groundwater-california-drought-aquifers-hidden-crisis/
Optional but cool video on the Colorodo River: http://e360.yale.edu/feature/video_colorado_river_running_near_empty/2443/
Respond in the 3-2-1 format
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