. ~T~a B 25 Zl] TOTAL PHYTOPLANKTON [plant cells] INDICATOR SCALE 2000 500 â 1000 500 INDICATOR SCALE 500 1000 - 500 INDICATOR SCALE 1000 500 i rISOO 33 r INOICATOR SCALE 1000 500 r 33 INDICATOR SCALE IN MILLIONS â 60 50

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