So they have found the type that could be harmful to humans. Does this not make it important enough to question the use of Glyphosate?
Muecke said the mats, which have been spotted “extensively” in the St. John River system, can wash up onshore and turn grey.
People can still be active and enjoy the outdoors, she said, but they should be aware that the algae can appear in different forms and in different locations in lakes and rivers.
The whole story: https://www.cbc.ca/news/canada/new-brunswick/blue-green-algae-st-john-river-1.5213110