"average daily peak concentrations of PM2.5 dropped by 3.05 µg/m³. For context, background pollution levels in the region typically hover around 8-9 µg/m³, making this reduction particularly significant for public health." I think that the numbers are already low enough that the drop is actually not very significant, at all. Is there any data that shows better health outcomes at 8 vs 13 for PM 2.5 levels? From my und…
But more importantly, when it comes to PM 2.5 levels, there are really no safe levels, the risks are just dose dependent, so lower is always better. In a city the size of NYC, lowering air pollution by 20% means a significant decrease in effects.
To give a good analogy, driving a car on the US is still quite safe, most of us take that risk, but still, thousands die annually from car accidents. A one fifth reduction in deaths from car accidents, even from its current low level, would be a major deal. In NYC, around 1 in 20 deaths is linked to air pollution.