Good morning!
Here is a good article on the "paradigm shift' we have been discussing - from treating wastewater for release into our storm sewers and waterways, to treating wastewater for supplementing our potable water system:
http://www.waterworld.com/articles/print/volume-26/issue-10/departments/wwema-corner/a-new-way-of-thinking-water-resource-recovery.html
Enjoy!
Teach.
Here is a great visual of how much water there is on earth
ReplyDeletehttp://ga.water.usgs.gov/edu/2010/gallery/global-water-volume.html