As Los Angeles grew exponentially in the mid-1900s and the car became the apple of capitalism's eye, the smog arose and rapidly overtook the beachside paradise.

Gas-powered cars and diesel trucks remain the state’s largest sources of smog and soot despite decades of cutting emissions.

Prepare for soaring temperatures near 100° and smoky air. Avoid the outdoors during peak heat hours for better air quality ...

In response, governments heeded the warnings of scientists and reversed course, with the two largest holes set to be "healed" ...

University of Utah researchers believe inflammation starts a months-long process that increases risk of aneurysm rupture.

KCAL News has issued a Next Weather Alert for the inland communities on Thursday, as peak heat arrives on the last day of a three-day heat wave.

Public Investigator asked the Department of Transportation why tests are still required, and what options exist for people ...

A Fourth of July air quality alert was issued for central Indiana due to smog levels. Residents advised to limit outdoor ...