Printer Friendly

Ozone update.

Every fall, the hole in Earth's ozone layer (protective gas in the upper atmosphere) opens wide. This year's hole was nearly the size of North America--35 percent larger than in 2002, when it shrank and split in two. But scientists remain convinced that the ozone hole will slowly disappear.

"Ozone holes should be smaller by the time today's teens are in their mid to late 20s," says scientist Craig Long of the National Oceanic and Atmospheric Administration. That's thanks to a law in 1987 banning chlorofluorocarbons (CFCs), or ozone-chewing chemicals, from aerosol cans and refrigerators. CFCs released before the ban have hovered above Earth's icy poles for decades before finally breaking down. An unusual cold spell in Antarctica this year sped up ozone depletion.--N.F.
COPYRIGHT 2003 Scholastic, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2003, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:Short Take
Publication:Science World
Date:Nov 17, 2003
Previous Article:Endangered species?
Next Article:Strike a pose.

Related Articles
Winter ozone gap detected over the Arctic.
Good science, weird reporting.
Ozone repair.
Ozone surprise.
Indoor air complaints: VOCs may not be cause of acute effects.
A comparison of ozone exposure in Fresno and Shaver Lake, California.

Terms of use | Privacy policy | Copyright © 2021 Farlex, Inc. | Feedback | For webmasters |