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Supertopics:
Autumn (Fall)
Pollen Allergens
Ragweed (Ambrosia species, cause of autumn hay fever)
Subtopics and Documents:
Global Warming Increasing Ragweed Pollen
Ragweed Photos
worst US cities and states for allergies and asthma
chamomile can intesify ragweed allergy
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Jane E. Brody
New York Times
1995-09-06