This image shows how the concentration of chlorophyll a, a measure of phytoplankton, has declined significantly (illustrated by shift from to blue) within a large ring of water in southern Lake Michigan. Credit: Foad Yousef.
3 posted on 09/08/2010 11:20:50 AM PDT by NormsRevenge
(Semper Fi ... Godspeed .. Monthly Donor Onboard .. Obama: Epic Fail or Bust!!!)