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Science Features : 2014

Killer Trees? Not Exactly

"Killer" Trees? Not Exactly

While some forests emit volatile organic compounds that are involved in ozone pollution, history shows attempts to control smog have a better chance of succeeding by focusing on vehicle emissions.

Arctic Ozone in Spring

Arctic Ozone in Spring

Though Earth's ozone layer has been depleted over the past four decades by chlorofluorocarbons (CFCs) and similar chemical compounds, the changes are expressed differently at the North and South Pole

Images Highlight U.S. Air Quality Improvement

Images Highlight U.S. Air Quality Improvement

After ten years in orbit, the Ozone Monitoring Instrument (OMI) has been in orbit sufficiently long to show that people in major U.S. cities are breathing less nitrogen dioxide--a yellow-brown gas that can cause respiratory problems.

In the News : Aura Features

Put a Lid on It
06.27.14 - Aura's Ozone Monitoring Instrument (OMI) images show that the effects of federal and state efforts have left the air far cleaner than it was a decade prior.

A Clearer View of Hazy Skies
06.24.14 - Remote Sensing Provides a Global Perspective on Pollution in the Atmosphere.

NASA Puzzles Out Ozone's Ups and Downs
04.25.14 - New NASA research on natural ozone cycles suggests ozone levels in the lowest part of Earth's atmosphere probably won't be affected much by projected future strengthening of the circulating winds that transport ozone between Earth's two lowest atmospheric layers.