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2014 Antarctic Ozone Hole Holds Steady

From NASA: The Antarctic ozone hole reached its annual peak size on Sept. 11, according to scientists from NASA and the National Oceanic and Atmospheric Administration (NOAA). The size of this year’s hole was 24.1 million square kilometers (9.3 million square miles) — an area roughly the size of North America. This image shows ozone…

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Ooops – According to NASA, ozone destroying CCl4 remains in atmosphere, and continues to be emitted

NASA research shows Earth’s atmosphere contains an unexpectedly large amount of an ozone-depleting compound from an unknown source decades after the compound was banned worldwide. Carbon tetrachloride (CCl4), which was once used in applications such as dry cleaning and as a fire-extinguishing agent, was regulated in 1987 under the Montreal Protocol along with other chlorofluorocarbons…

Claim: Climate change may worsen summertime ozone pollution

From the National Science Foundation: Americans face 70 percent increase in unhealthy ozone levels by 2050 Ozone pollution across the continental U.S. will become worse as global temperatures rise. Credit and Larger Version May 5, 2014 Ozone pollution across the continental United States will become far more difficult to keep in check as temperatures rise,…

Claim: Climate change threatens to worsen U.S. ozone pollution

From UCAR:  BOULDER—Ozone pollution across the continental United States will become far more difficult to keep in check as temperatures rise, according to new research led by the National Center for Atmospheric Research (NCAR). The detailed study shows that Americans face the risk of a 70 percent increase in unhealthy summertime ozone levels by 2050.…

Good news: no ‘ozone hole’ in the Arctic

From the Massachusetts Institute of Technology Plugging an ozone hole MIT researchers find that the extremes in Antarctic ozone holes have not been matched in the Arctic CAMBRIDGE, Mass– Since the discovery of the Antarctic ozone hole, scientists, policymakers, and the public have wondered whether we might someday see a similarly extreme depletion of ozone…