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The ozone layer sits near the top of Earth's atmosphere and protects us from the sun's harmful ultraviolet rays. But ozone is dangerous when it's closer to ground level. Given the statement above, what
asked
Sep 3, 2017
Biology
high-school
2
answers
0
votes
235k
views
Contains elements in the solid, liquid, and gas phase a. alkali metals b. alkaline earth metals c. transition metals d. halogens e. noble or inert gases
asked
Aug 13, 2015
Chemistry
high-school
1
answer
1
vote
203k
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