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How City Lights Are Extending Pollen Season and Making Allergies Worse
HealthApril 3, 2026

How City Lights Are Extending Pollen Season and Making Allergies Worse

Scientists have found that artificial light from cities delays the end of pollen season by disrupting plants' natural light-dark cycles, worsening allergy symptoms for millions. A Vanderbilt University study linked nighttime lighting to longer exposure to high-pollen days in Northeastern cities.