EPA To Ease Back Emissions StandardsEnvironmental regulators announced on Monday they will ease emissions standards for cars and trucks, saying that a timeline put in place by President Barack Obama was not appropriate and set standards "too high."
US Fails To Enforce Smog Rules, 14 States Allege In LawsuitFourteen states and the District of Columbia announced Thursday that they are suing the Trump administration over what they say is a failure to enforce smog standards.
SoCal Smog Worsens For Second Straight Year Despite Emissions DeclineThe last time the region had more than 140 bad air days was in 2004, when there was more than twice as much smog-forming pollution.
Southern California Clean-Air Plan Up For VoteA long-term plan for cleaning up the air in a huge swath of smoggy Southern California is due for consideration by regulators.
Southern California Having Smoggiest Summer Since 2009Southern California is having its smoggiest summer in nearly a decade and hospitals report an increase of people with breathing problems.
Children In Southern California Breathing Easier, Study SaysSmog-covered mountains, gritty sidewalks, smelly fumes from traffic-choked freeways. Los Angeles was a tough place to breathe several decades ago but a study shows how much that has changed, especially for the region's youngest residents.
Hot October Drives Up SoCal Smog LevelsHot, stagnant weather caused smog levels to jump in Southern California this year.
Pioneering Researcher Behind State's Clean-Air Regulations DiesJames Pitts, a pioneering smog researcher whose work spurred California's ground-breaking clean-air regulations, has died. He was 93.
Report: SoCal Tops List For Worst Air Pollution In U.S. Southern California is back at the top of the list for having the worst air pollution in the country.
Air Quality Monitors To Be Installed To Measure Vehicle Pollution On SoCal FreewaysFederal regulators will begin testing pollution levels in the air near freeways in Southern California and across the nation next year.
Supreme Court Strikes Down 'Clean Trucks' Program At Port Of LAThe Supreme Court has overturned part of the anti-smog program at the Port of Los Angeles.
Study: Los Angeles Smog Pollution On The Decline Los Angeles skies are less smoggy, a sign that emission-control strategies are working, new research has found.