Image: Algae swirls across a South African reservoir

PHYSorg
Jan 7, 2026, 1:35 pm192 pts
On clear days in Hartbeespoort, South Africa, satellite images often reveal a reservoir with shades of deep blue interrupted by drifting patches of vivid green. These shifting features indicate algae blooms, which can affect water quality, ecosystems, and nearby human communities.

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Image: Algae swirls across a South African reservoir

PHYSorg

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