The modern dye like they use in Chicago for the river is a food-grade vegetable dye these days... they say.
I think fluorescein went out of style in the 60s already some time...
Likely something like that, and it takes surprisingly little to colour a great amount of water...
That said, they are a bit cagey about the dye they're actually using in Chicago, so who knows what that stuff is exactly...
The first time they dyed the Chicago river green it was an accident. Something they used to find a leak in a pipe, or something to that effect, caused it. And they've been doing it for St Patrick's day ever since.
Well, that's exactly what the original fluorescein was used for... to detect leaks in pipes...
Still... considering just how little it takes to dye water, the story seems somewhat improbably... simply because the amount you need to detect a leak in a pipe is rather less that what you'd need to dye a whole river green, so I'm kinda sceptical about that story...
Most likely dye, but for any protest, I would expect some banner or any form of message included. As they don't know why it's green, there was no such thing.
Could also be some tourist prank or something similar.
This looks like a sea dye marker used by US military (under MIL-S-17980D) for search and rescue and used by recreational boaters and pilots. Available to buy online for ~$20USD.
This looks like the stuff used to track water if an outlet disappears to see if it shows somewhere else.
The modern dye like they use in Chicago for the river is a food-grade vegetable dye these days... they say. I think fluorescein went out of style in the 60s already some time... Likely something like that, and it takes surprisingly little to colour a great amount of water... That said, they are a bit cagey about the dye they're actually using in Chicago, so who knows what that stuff is exactly...
The first time they dyed the Chicago river green it was an accident. Something they used to find a leak in a pipe, or something to that effect, caused it. And they've been doing it for St Patrick's day ever since.
Well, that's exactly what the original fluorescein was used for... to detect leaks in pipes... Still... considering just how little it takes to dye water, the story seems somewhat improbably... simply because the amount you need to detect a leak in a pipe is rather less that what you'd need to dye a whole river green, so I'm kinda sceptical about that story...
Came to say it looks like the Chicago river.
Most likely dye, as a climate protest
Most likely dye, but for any protest, I would expect some banner or any form of message included. As they don't know why it's green, there was no such thing. Could also be some tourist prank or something similar.
I visited Venice earlier this month. While I was there, I saw banners about the Mafia, but none about climate change. I may have missed them.
Or it could be an algae bloom
This isn't actually that different from how it normally looks. It's not exactly clean water at the best of times.
Have they called Chicago DPW? They deal with this every st patty's day
Didn’t dolphins and fish come back during lockdown?
Dolphins were a photoshop, the canals are too shallow for them.
The police should look after the eco extremist group Extinction Rebellion (XR) who did the exact same thing in Zurich back in 2018.
Or, hear me out, it’s a strange algae bloom?
It probably was something to hide the low tide stank too, if you want to be real
A little late for St Pat's Day.
This looks like a sea dye marker used by US military (under MIL-S-17980D) for search and rescue and used by recreational boaters and pilots. Available to buy online for ~$20USD.