NYC is one of the greenest cities on earth. Its entire public transit system is electric. traffic in Manhattan is limited and regulated. Itβs almost entirely livery traffic now, primarily electric.
Whales and dolphins are regularly spotted in the Hudson River now.
The air quality index in New York right now is 32 (midday, it jumps into the 40s at night), which is the same as it is today in Denver.
London has an AQI of 2
Moscow? They just stopped measuring it, thanks to the Ukraine drone attacks.