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Supertopics:
US Air Pollution
Global Warming Increasing Allergens Miscellany
Asthma Miscellany
Allergens by Location
Ragweed (Ambrosia species, cause of autumn hay fever)
Ozone as Pollutant through 2017
worst US cities and states for allergies and asthma
Documents:
climate change increasing ragweed pollen and ozone pollution (pdf)
web
Juan Declet-Barreto, Ph.D. and...
NRDC
2015-05-01