I sure didn’t notice it. My trip to NYC over Thanksgiving week left me with sore and painful lungs nearly every day I was there.
Even more reason to promote things like this instead of being apathetic
That’s like saying “I sure didn’t notice climate change, because it was cold when I visited Texas”
Your quote made me instantly angry, so, well done.
Normally I’d agree with you, but I’ve been traveling to NYC once or twice a year for the past 8 years, was there for 5 days, and only had issues on the most recent trips.
So you had one, subjectively bad personal experience and that somehow disproves or discredits an empirical scientific study ?
Two, actually. And they were almost a year apart. And it didn’t happen in Brooklyn, only in Manhattan.
I’m obviously not discrediting the study, only stating that I didn’t notice a difference. Clearly 20% cleaner is not enough for me. 
Sounds like you got a cold. That often happens when traveling to cities with millions of people during a cold holiday.
I would have a love for it to be a cold, but I have never had colds with no other symptoms than burning lungs when I am walking down the street in Manhattan.
What street, by the way? Because I lived in Manhattan and Brooklyn for over 15 years, biking on the streets, and this wasn’t ever a problem for me. But there are some roads, especially the exits of the tunnels, that can be particularly bad as they’re just nonstop traffic all day every day. I used to run a server room in a building directly over the exit of the Lincoln Tunnel and those server racks got coated with black particulate, it would permanently stain any clothes I accidentally put in contact with them.
Our hotel was in FiDi, but I had issues even in Midtown. I have a brother in Harlem, and when I mentioned it to him, he was not surprised.
We come up to visit our daughter pretty regularly. I usually don’t have issues when I go to NYC, just these past two times when it was downright painful. 
