Welcome to summer in Denver: hot days, cool nights and electronic billboards advertising ozone action alerts (like the one currently in effect), urging people to combine car trips and carpool if ...

Warmer temperatures might be causing plants to emit more chemicals into the atmosphere, adding to one of Phoenix's worst air pollution problems.

Atmospheric researchers depart this month on NASA’s DC-8 research aircraft on their third survey of the global atmosphere. Taking place for the first time in Northern Hemisphere fall, the season gives ...

Please provide your email address to receive an email when new articles are posted on . The EPA announced that it will be conducting a new review of ozone standards, delaying action until as late as ...