The entire canal is clogged up with people who see a boat as a cheap home and squat on the towpath with no sanitation, just a bucket over the side. Electricity from a petrol generator and heat from burning fossil fuels. Hardly off grid and the only thing green is the water.
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It’s where
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Cyanobacteria -- "blue-green algae" -- creates toxic bloom. Indicative of too much nitrates in the water. Run-off, sewage, etc.
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Not to antagonize any phycologists or minimize the importance of harmful algal blooms....but doesn't it look like duckweed?
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I accept that. Could be, but the colour maybe looks a little too blue -- dependent, of course, on photographic rendering. But duckweed also survives on nitrates. I saw a bloom like this in Clissold Park one year (early 2000s?), and it was cyanobacteria, and all the ducks died.
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Increased co2, ask St Greta to have a look
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Duck weed, water will be clear underneath.
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It's called Duck Weed.. A tiny green leaf that can double overnight..
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Err... isn't this something to do with heat? i.e global warming?
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Regent's swamp...
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Best blame Sadiq Khan
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PEA SOUP
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People are joking climate change but CO2 feeds the algae and plant life. This is why the planet is greener. They in turn release oxygen for us
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These algae will cause the oxygen concentration in the water to drop, killing most life beneath the surface. It's caused by an overabundance of nutrients in the water, possible from fertilizers polluting the water. Hardly a sign of a healthy environment.
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Think you are confusing Duck weed, for algae.
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I'm not sure which of them it is in the photo, it's hard to tell so I could easily be getting them mixed up!
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I thing Duck week grows on the surface, and algae grows throughout the depths, ready to be corrected.

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I think it is duckweed. Green Algae gets close to the surface to pick up sun rays for photosynthesis but this does look like it's on top of the water.
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Take a dog there and watch them think it’s grass. Hilarious.
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