New Study Links Global Warming, Longer Allergy Season

Global warming may to be blame for a longer ragweed pollen (read: allergy) season.  

Ragweed season is now 27 days longer in the northernmost areas of North America, according to a new peer-reviewed study in the "Proceedings of the National Academy of Sciences."

With warming temperatures taking over more of winter, pollen-bearing plants have more time to thrive, according to the study.

Ragweed season was especially prolonged farther up north, in places like Wisconsin and Minnesota.

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