Ключевые слова: agent, allergen, allergenic, allergies, allergy, ambrosia, asthma, autumn, background, blackboard, blooming, care, causing, chalkboard, dangerous, disease, fever, flat, flora, flowering, genus, grey, health, illness, inflorescence, invasive, lay, light, medical, medicine, nature, object, plant, pollen, ragweed, reaction, seasonal, seed, spring, strong, summer, table, top, toxin, view, weed, white, wild, wooden, word,