Living near the Finger Lakes I hear about these a lot in the late summer. Not only are the world’s 37aquifers running low, but our fresh, surface waters are becoming toxic. Farming and gardening practices, and overpopulation drive climate change, resulting in these blooms.
This could create a tipping point which could threaten public health on a grand scale.
www.nytimes.com/2018/08/29/science/lake-superior-algae-toxic.html