How much do you know about the ozone layer? See how you stack up against unsuspecting passerbys in Portland, Oregon with a quiz from G Word correspondent, Lori Harfenist.
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G Word: O Zone
How much do you know about the ozone layer? See how you stack up against unsuspecting passerbys in Portland, Oregon with a quiz from G Word correspondent, Lori Harfenist.
Added: Jul 30, 2008
Views: 922 Views
Runtime: 01:31
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