Despite decades of progress in reducing air pollution, Los Angeles is still the nation's smoggiest city, according to a ...

Contributing: Eduardo Cuevas, John Bacon, Michelle Maltais, USA TODAY This article originally appeared on USA TODAY: Los Angeles air quality and smoke maps: See latest AQI numbers in Southern ...

ABC News joined The Arbor Day Foundation and the Altadena nonprofit Amigos de los Rios to discuss replanting and preserving ...

In fact, the AQI could be in a healthy range ... operates about 35 air monitoring stations across nearly 11,000 square miles ...

As fires burned in Los Angeles this year, newer toxin monitors found contaminants that aren’t measured by standard methods.

Residents across New York and New Jersey are dealing with poorer air quality than usual, but a new report revealed that even more states are still dealing with this problem.