The number of trucks I see that are either horribly maintained or purposefully modified to defeat emissions devices spewing massive clouds of black smoke every time they step on the accelerator pedal speaks otherwise to me.
Rolling Coal is absolutely a thing.
This was the claim I was addressing. Truckers (a group that applies to more than just people in NYC) are intentionally giving kids asthma through their choices to defeat or not maintain emissions equipment, I see it every day. Maybe NYC is enforcing their emissions standards enough to no longer make it worth it to truckers there, but don't doubt they'd go back to belching toxic fumes to save a penny if given the chance there. They do it practically everywhere else.