Posted by abdulwasay on Tuesday, January 15, 2013 at 12:02am.
Since this is not my area of expertise, I searched Google under the key words "when ozone layer formed" to get these possible sources:
http://www.google.com/search?client=safari&rls=en&q=when+ozone+layer+formed&ie=UTF-8&oe=UTF-8
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
Related Questions
CHEMISTRY - The atmosphere contains about 6.8×1013 moles of ozone. If this...
science - 1. Force exerted on an area is called _____. (1 point) pressure ...
Science - Why can't the ozone layer be higher in the atmosphere?
Chemistry Ozone layer - what is the ozone layer made out of because on differnt...
science - how does the thinning of the ozone layer protect your health?
Physical Science - How does the ozone layer cause global warming?
Earth Science - A layer of sandstone is found on top of a layer of limestone in ...
earth science - what makes scientists think that the ozone layer is disappearing...
Environmental Science - Nonliving and living factors that contribute to or are ...
precalc - The depletion of the Earth's ozone layer has created concern among...
For Further Reading
