Harmful Algal Blooms
U.S. maps for pre-1972 and post-1972 show the increase in harmful algal blooms around U.S. coastlines.
http://www.redtide.whoi.edu/hab/HABdistribution/HABmap.html
Woods Hole Oceanographic Institution
Indicated on map:
NSP
DSP
Fish kills
Ciguatera
Brown tide
ASP
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