Pollen Counts, and Allergies, Expected to Double by 2040
. Future levels of pollen production are expected to increase substantially as a result of climate change, says Leonard Bielory, a Rutgers professor at the Center for Environmental Prediction and CECI affiliate
. Pollen counts are expected to reach an average of 21,735 grains of pollen per cubic meter by 2040, compared to an average for the year 2000 of 8,455 grains per cubic meter.