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In mid‑October 2025, storm Alice hammered Spain with torrential rain, causing floods in Catalonia, Valencia and the Balearic Islands . The deluge forced rail lines to close and dozens of flights were cancelled . After the water recedes, quick action is essential: mould can start growing within 24–36 hours, so experts advise removing standing water promptly, airing out rooms and using dehumidifiers.

Air exchange is key: without sufficient ventilation, carbon dioxide (CO₂) levels rise, a sign of poor air quality. A U.S. study in elementary schools found CO₂ concentrations above 1,000 ppm in most classrooms, indicating inadequate ventilation . These rooms had more respiratory viruses detected in air and nasal samples, while classrooms with higher air exchange showed about an 80 percent lower infection risk .

Myopia, or nearsightedness, is on the rise worldwide, particularly among children living in urban areas across East Asia. While genetics, screen time, and lack of outdoor activity have long been cited as key risk factors, a new and often overlooked element is now drawing attention: air pollution. A large-scale study from China, published in the Proceedings of the National Academy of Sciences (PNAS), offers new evidence that pollutants in the air may have a direct impact on ch