During the early 1970s, the air in many American cities was … brown. Pollution muddied clear skies and sickened people across ...

Outdoor enthusiasts are worried about the loss of their favorite vistas as President Donald Trump's administration considers weakening a 26-year-old rule designed to improve visibility over national p ...

Learn essential steps to clean indoor air after wildfire smoke. Guide covers ventilation, HEPA filters, air quality monitoring & removing odors for a safer home.

A third of Americans still breathe unhealthy air after decades of improvements—which the Trump administration wants to roll ...