Big Culprit for Allergies? Evidence Points to Global Change

If you have respiratory allergies, you have an environmental problem: There's something in the air that makes you sniffle, sneeze, stuff up or wheeze. And growing evidence suggests your problem may be linked with the biggest environmental problem of all: global climate change. That may be especially true for pollen sufferers. Tree, grasses and weeds (including the ragweed tormenting many people right now) churn out more pollen over more weeks when temperatures and carbon dioxide levels rise,...Full Story
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