ozone

The new State Implementation Plan (SIP) would require annual diagnostics testing of gasoline-powered vehicles that are between two and 24 years old.

San Antonians could suffer from breathing problems if they spend too much time outside.

Some San Antonians could suffer from breathing problems if they spend too much time outside on Thursday.

In the 1980s, the world came together to ban CFCs, commonly used chemicals that were destroying the atmosphere’s ozone layer. Are there lessons we can apply to tackling climate change?

The ozone layer is a thin shield in the stratosphere that protects humans and the environment from harmful levels of the sun's ultraviolet radiation.

The Texas Commission on Environmental Quality is issuing an Ozone Action Day for the San Antonio area today, as temperatures climb to the 100s.According…

About 17 million Texans live in areas that consistently have unhealthy levels of ozone or particle pollution. That figure comes from the American Lung…

Despite the area's years-long efforts to lower emissions, Bexar County fell short of meeting the Environmental Protection Agency's new clean air…

The U.S. Environmental Protection Agency has given San Antonio a pass on air pollution until spring of 2018. But in a letter to Governor Greg Abbott last…

For years, San Antonio and its surrounding areas have been bordering on failure to meet the National Ambient Air Quality Standards.A new report on local…