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by Javantea — Oct 2, 2012


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Different air masses which affect North America, as well as other continents, tend to be separated by frontal boundaries

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Different air masses which affect North America, as well as other continents, tend to be separated by frontal boundaries.

Edit
Promote Demote Fragment Fix

+ −
Different air masses which affect North America, as well as other continents, tend to be separated by frontal boundaries.

Edit
Promote Demote Fragment Fix
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