The Environmental Literacy Council
http://enviroliteracy.org/category.php/14.html

Ocean Institutes - Woods Hole Oceanographic Institution
http://www.whoi.edu/institutes/index.htm

World Resources Institute: Earth Trends
http://earthtrends.wri.org/

UN Environment Programme
http://www.unep.org/themes/freshwater/>

National Audubon Society
http://www.audubon.org

IRC International Water and Sanitation Centre
http://www.irc.nl/content/view/full/104