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Test # 50


1.
The Hydrochlorofluorocarbons (HCFCs) are the compounds which have the following molecules: 1. Hydrogen 2. Carbon 3. Chlorine 4. Fluorine Which among the above plays the most important role in Ozone depletion?

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In the United States in 1976, a pound of potato chips cost 200 times more than a pound of potatoes.      .. More >>

genus pogonia:
n.
1.small but widely distributed genus of orchids closely related to genus Cleistes      .. More >>
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