Image of Hanoi cloudy due to increased fine dust in the evening

    Cao Thơm - Nguyễn Linh |

    Hanoi - On June 20, air pollution continued, many people expressed concern about their health.

    Vao toi ngay 20.6 tai Ha Noi, tinh trang o nhiem khong khi bat dau xuat hien tu 19h30, khien bau troi tro nen mu mit, bao phu boi mot lop suong bui day dac.
    On the evening of June 20 in Hanoi, air pollution began to appear from 7:30 p.m., causing the sky to become foggy, covered with a thick layer of fog and dust.
    Nguoi dan cam nhan ro su ngot ngat, kho tho do khoi bui day dac tu cac phuong tien giao thong gay ra.
    People clearly feel the suffocation and shortness of breath caused by the dense smoke and dust from vehicles.
    Tai quan Tay Ho (Ha Noi), cac toa nha cao tang gan nhu chim han trong lop bui suong day dac, khien tam nhin xa bi han che.
    In Tay Ho district (Hanoi), high-rise buildings are almost completely submerged in a thick layer of dust and fog, limiting visibility.
    Chi Dang Thanh Thu (Ha Noi) chia se, chi cam thay rat kho chiu voi tinh trang khong khi ngot ngat va suong mu day dac bat thuong tai Ha Noi gan day. “Thoi tiet nay lam minh hay bi viem mui, cam cum, nen cu ra duong la phai deo khau trang“, chi noi.
    Ms. Dang Thanh Thu (Hanoi) shared that she felt very uncomfortable with the stuffy air and unusually dense fog in Hanoi recently. "This weather often causes usury and flu, so we have to wear masks every time we go out," she said.
    Theo du lieu tu trang web IQAir, luc 20h, ngay 20.6, chi so chat luong khong khi (IQAir) tai Ha Noi thuoc nhom Khong lanh manh.
    According to data from the IQAir website, at 8:00 p.m. on June 20, the air quality index (IQAir) in Hanoi was in the Unhealthy group.

    Theo GS.TS Hoang Xuan Co, Nguyen Giam doc Trung tam nghien cuu quan trac va mo hinh hoa moi truong (Dai hoc Khoa hoc Tu nhien, Dai hoc Quoc gia Ha Noi): “Mac du do am khong khi thuong duoc xem la mot yeu to thoi tiet thong thuong, cac nghien cuu gan day da chi ra mot vai tro dang lo ngai hon. Khi do am tang cao, no se hoat dong nhu mot chat xuc tac, tao dieu kien ly tuong cho su hinh thanh cac chat o nhiem thu cap.”

    According to Prof. Dr. Hoang Xuan Co, Former Director of the Center for Environmental Monitoring and Modeling Research (University of Natural Sciences, Vietnam National University, Hanoi): Although humidity is often considered a common weather factor, recent studies have shown a more worrying role. When moisture increases, it acts as a catalyst, creating ideal conditions for the formation of secondary pollutants.

    “Can phan biet ro, chat o nhiem so cap la nhung chat duoc phat thai truc tiep tu nguon nhu khoi nha may (chua SO₂) hay khi thai xe co (chua NOₓ). Tuy nhien, khi cac chat nay ket hop voi do am cao trong khong khi, chung se trai qua cac phan ung hoa hoc de tao thanh nhung chat o nhiem thu cap, hinh thanh ngay trong khi quyen va thuong co muc do nguy hai cao hon“, GS.TS Hoang Xuan Co nhan manh.
    It is necessary to clearly distinguish between primary pollutants that are directly emitted from sources such as factory smoke (containing SO2) or vehicle emissions (containing NOx). However, when these substances combine with high humidity in the air, they will undergo chemical reactions to form secondary pollutants, which form right in the atmosphere and often have a higher level of harm, emphasized Prof. Dr. Hoang Xuan Co.

    Cao Thơm - Nguyễn Linh
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    As the evening went on, Hanoi's air became increasingly stuffy, at times the most polluted in the world

    Huy Hùng |

    indices show that Hanoi increases pollution at night.

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