"Email " is the e-mail address you used when you registered.
"Password" is case sensitive.
If you need additional assistance, please contact customer support.
ozone depletion, gradual thinning of Earth’s ozone layer in the upper atmosphere caused by the release of chemical compounds from industry and other human activity that contain gaseous chlorine and bromine. The thinning is most pronounced in the polar regions, especially over Antarctica. Ozone depletion is a major environmental problem because it increases the amount of ultraviolet (UV) radiation that reaches Earth’s surface, increasing the rate of skin cancer, eye cataracts, and genetic and immune system damage. The Montreal Protocol, ratified in 1987, was the first of several comprehensive international agreements enacted to halt the production and use of ozone-depleting chemicals. As a result of continued international cooperation on this issue, the ozone layer is expected to recover over time.
"ozone depletion." Encyclopædia Britannica. Encyclopædia Britannica Online. Encyclopædia Britannica, 2011. Web. 13 Mar. 2011. <http://www.britannica.com/EBchecked/topic/437224/ozone-depletion>.
ozone depletion. (2011). In Encyclopædia Britannica. Retrieved from http://www.britannica.com/EBchecked/topic/437224/ozone-depletion
|
Please join our community in order to save your work, create a new document, upload
media files, recommend an article or submit changes to our editors.
Enter the e-mail address you used when registering and we will e-mail your password to you. (or click on Cancel to go back).
Copy and paste the HTML below to include this widget on your Web page.
Copy LinkAdd to project: | |
Remove from Project: |