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There is now a CONTENT FREEZE for Mercury while we switch to a new platform. It began on Friday, March 10 at 6pm and will end on Wednesday, March 15 at noon. No new content can be created during this time, but all material in the system as of the beginning of the freeze will be migrated to the new platform, including users and groups. Functionally the new site is identical to the old one. webteam@gatech.edu
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Ronald Reagan once sloughed off the need for tougher clean-air rules, blaming vegetation for pollution. That simplistic notion was rebuffed by scientists who noted that trees help make overall air quality better by taking up pollution and they also help to cool off urban areas, which also can translate into less pollution. So the U.S. Environmental Protection Agency recommends trees for cities dealing with the kind of pollution that's challenged Louisville for decades, including this summer.
But trees do emit a chemical that can add to ground-level ozone. And a new study from Georgia Institute of Technology suggests that climate change could exacerbate that and extend the ozone season across the American Southeast.
