Though air quality levels in New York City are usually good and have improved over time, air quality index measurements ...

On top of the fact that Wednesday is a messy, murky day weather-wise in the tri-state area, much of the region is also under an air quality alert due to elevated levels of fine particulate matter (PM ...

NYC and nearby counties faced an air quality alert due to high levels of fine particulates, unhealthy for sensitive groups.

Despite objections and doubts, these big cities are showing that approaches to reduce pollution can and do work.

Air pollution is dropping as a result of congestion pricing in New York City. Researchers at Cornell University said particle pollution has significantly decreased since the program took effect nearly ...

Higher levels of PM2.5 particulate matter are associated with significantly slower marathon finish times For every unit increase in pollution, male runners were 32 seconds slower and female runners 25 ...

They already face the highest rates of asthma-related mortality in the nation. Dirtier air will make that worse.