Toxic Algae Turns Lake Erie Bright Green
Anyone who lives near the Great Lakes of North America is likely familiar with the green algae that can encroach upon its deep blue waters. The Great Lakes hold a fifth of Earth's fresh surface water. They are incredibly valuable aquifers and ecosystems, hosting plenty of plant and animal life. But like all ecosystems, they change with the seasons and the times. Scientists track these changes in many ways, perhaps most dramatically through satellite imagery.