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81.5 MB (5.4 MB compressed)
4359 x 6538 pixels
36.8 x 55.4 cm ⏐ 14.5 x 21.8 in (300dpi)
JIM WEST / SCIENCE PHOTO LIBRARY JIM WEST / SCIENCE PHOTO LIBRARY
Toxic algae in Lake Erie. Sign warning of toxic blue-green algae (cyanobacteria) in the water of Lake Erie at Maumee Bay State Park, Ohio, USA. Caused largely by phosphorus runoff from agricultural fertiliser, algal blooms have appeared in recent summers in western Lake Erie. Some contain cyanobacteria, which may produce harmful toxins, a threat to local drinking water supplies.
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