We’re gonna need a stronger pill. Each year, the seasonal allergy warnings grow louder — as does the chorus of sniffling, sneezing and hacking. You can blame warmer temperatures, which “extend the duration of the pollen season,” and pollutants in the air that “can increase the potency of pollen allergens,” NYU Langone allergist Dr. Stephanie Mawhirt said. Other human activities could be worsening the problem, like landscaping with non-native plants that produce a lot of allergens. Mawhirt tells