Ground-Level Ozone

The EPA chose to reduce the current standard of 75 parts per billion, unchanged since 2008, by 5 ppb. Public health and environmental groups insist that a safe standard would be 60 ppb, while businesses point to the high costs to comply with 70 ppb.
Oct 2, 2015   The Wall Street Journal
San Antonio's soon-to-be-adopted air quality plan will focus on transportation to reduce the city's air pollution.
Jul 25, 2015   San Antonio Express-News
No, this is not a headline out of <em>The Onion</em>. Apparently, leaders at last weekend's G8 Summit agreed to “the biggest step in years in tackling climate change,” as reported by Geoffrey Lean.
May 23, 2012   Grist