Questions for “Pond scum can release a paralyzing pollutant into the air”
![a photo of bright blue-green algae on the surface of water at a pond's edge](https://www.snexplores.org/wp-content/uploads/2021/06/1030_polluting_pond_scum_feat.jpg)
Overgrowth of cyanobacteria — the blue-green algae coloring the water here — can release toxic pollution, making this water dangerous to animals and people.
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