This year, in many Russian cities, poplar trees bloomed earlier than usual and fluff began to fly, which many consider to be the cause of seasonal allergies. However, in fact, it is not the fluff itself that causes allergic reactions, but the pollen of other plants that it carries. In a conversation with RT, experts explained what role poplars play in landscaping and why these trees were actively planted in cities, and also explained which plants are the main sources of allergens in the urban environment and how to protect yourself from their pollen. Read more