BBC: Windermere on verge of 'catastrophe', campaigner warns
“England's largest lake is on the verge of "catastrophe" unless urgent action is taken to improve its water quality, a conservationist has warned.
Blue-green algae blooms, which make humans ill and can be fatal to animals, are increasing on Windermere, zoologist Matt Staniek said.
The blooms also reduce aquatic oxygen levels, which affects fish numbers.”