If this tweet is correct the stuff they used is vegetable dye (presumably biodegradable, therefore safe), and they've been doing this since the 1960s. This IS normal for Chicagoans. The fact that the news anchor felt no need to explain what the dye is and address concerns whether it's safe means their local Chicago-area audience is expected to be familiar with this ritual.
No such clue on if it's safe or not, for the environment. A flood of simple elements like nitrogen can cause huge algae blooms that fall to the bed, dead, draining the water of oxygen. That's why the gulf of Mexico has the huge death zone.
https://twitter.com/Kathryn18132857/status/1371173477391171588
If this tweet is correct the stuff they used is vegetable dye (presumably biodegradable, therefore safe), and they've been doing this since the 1960s. This IS normal for Chicagoans. The fact that the news anchor felt no need to explain what the dye is and address concerns whether it's safe means their local Chicago-area audience is expected to be familiar with this ritual.
No such clue on if it's safe or not, for the environment. A flood of simple elements like nitrogen can cause huge algae blooms that fall to the bed, dead, draining the water of oxygen. That's why the gulf of Mexico has the huge death zone.
yea this is like the "don't worry it's BPA free" moms who buy stuff that's just loaded with BPS instead