Ключевые слова: abstract, allergenic, allergic, allergies, allergy, background, beautiful, biology, blossom, blue, branch, bright, city, closeup, cotton, cottonwood, day, dissemination, down, environment, female, field, fluff, fluffy, flying, fuzz, grass, green, herb, lawn, leaf, macro, natural, nature, people, plant, pollen, poplar, reproduction, risk, season, seasonal, seed, spores, spring, summer, texture, tree, tufts, white,