My allergist in North Carolina tests for allergies to pine pollens, and my reaction was a 5 (out of 5), so I guess that enough of us out there are allergic to it, possibly because of the sheer volumes we've encountered. Bernadette Roche Department of Biology Loyola College 4501 N. Charles St. Baltimore, MD 21210 broche at loyola.edu 410-617-5591