Hyderabad eight times more polluted in 2023 vis à vis WHO standards 0 21.03.2024 18:06 The Hindu While the World Health Organisation had set 5 µg/m³ as the upper limit for PM2.5 pollution, Hyderabad’s annual mean concentration of the particles was 39.9 µg/m³ in 2023, shows a report by a Swiss air quality technology company Партнёры Smi24.net Все новости за 24 часа Музыкальные новости Агрегатор новостей 24СМИ
