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• n  a colorless gas (O3) soluble in alkalis and cold water; a strong oxidizing agent; can be produced by electric discharge in oxygen or by the action of ultraviolet radiation on oxygen in the stratosphere (where it acts as a screen for ultraviolet radiation)

• The EPA tightened restrictions on ozone, but why is the new limit still higher than what science recommends? Critics say it comes down to politics and money.
• A large part of the controversy over the British-French Concorde arises from concern about the big jets' effect on the ozone layer, which protects life on earth from lethal doses .
• A healthy ozone layer blocks a large part of the sun's ultraviolet radiation, which in big enough doses can cause skin cancer and harm plant life crucial to the food chain.

News & Articles

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• Ozone health watch posted through Friday
  High concentrations of ozone may occur and children and adults with respiratory problems are urged to avoid outdoor activities.
  June 21, 2013 - CBS 5 Phoenix
• Ozone alert issued by health department for parts of Colorado
  An ozone action day alert was issued Wednesday by the Colorado Department of Public Health and Environment and the Regional Air Quality Council.
  June 19, 2013 - Denver Post
• Ozone alert issued Tuesday as temperatures climb (+video winners)
  Ozone alerts were issued for multiple counties along the Wasatch Front as the temperatures started to climb.
  June 18, 2013 - Deseret News

Quotes

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• Lamar Alexander in International Herald Tribune
  It is important to remember the Smokies has among the highest levels of ozone or smog in the eastern United States, either inside or outside a national park,Alexander said. "And it has one of the highest rates of sulfur and nitrogen...
• Achim Steiner in Reuters
  Governments had a golden opportunity to deal with the twin challenges of climate change and protecting the ozone layer and governments took it,Achim Steiner, UNEP's executive director, said in a statement. "The precise and final savings in...