Imagery of the Western Lake Erie harmful algal bloom from September 26, 2017. The scum shown here near downtown Toledo stretched all the way to Lake Ontario. This photo is from Landsat-8 (a NASA/USGS satellite)

Can we clean up, stop, or end harmful algal blooms?

Many people ask, “Why not just clean up the algae?” Unfortunately, the answer is not so simple. Harmful algal blooms are a natural process that have been occurring throughout history ‐ and many human activities cause environmental changes that promote the development of harmful blooms. However, there are ways to lessen the effects of these events.

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