SCIENCE IN THE NEWS DAILY
Mending Ozone Hole May Worsen Climate Change
from Scientific American
Decades of chemical pollution have damaged the ozone layer of the upper atmosphere that shields Earth from the harmful effects of the sun's ultraviolet rays, each summer eating a hole over the South Pole that expands to nearly the size of Antarctica.
But since 1996, when an international treaty banned the culprit chemical refrigerants and propellants ... , the size of the seasonal tear has been shrinking - and scientists predict it may stop forming by the end of this century.
You would think that was good news. But atmospheric scientists caution in a new study published in Science that sewing up the rift in the ozone ... layer may exacerbate another environmental woe: climate change.
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PODCASTS: Expanding With the Cosmos
Using the Atacama Cosmology Telescope (ATC), a 6.5-meter microwave collector in Chile, cosmologists are piecing together the early history of the known universe. In an exclusive American Scientist interview, Arthur Kosowsky—a member of the ATC team and a professor in the Department of Physics and Astronomy at the University of Pittsburgh—discusses how he is using ATC to reach back in time billions of years to search for gravitational waves that could verify inflation and reveal unprecedented details about how the cosmos was born.
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