Little Science Behind 'Pollen Vortex' Prediction

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Little Science Behind 'Pollen Vortex' Prediction

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Little Science Behind 'Pollen Vortex' Prediction

Associated Press Videos 1:59 mins

Headlines warn of yet another bad allergy season stemming from this winter's polar vortex, but these dire annual predictions may be based more on guesswork than science. Count the pollen to know for sure. (April 25)

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