On October 1, Mr. Nguyen Van Tai, Director General of Vietnam Environment Administration, identified PM2.5 fine dust concentration in Hanoi at the highest level in the last 5 years. <br /> He recommended “people People, especially children, the elderly, pregnant women, people with respiratory diseases should limit going out, participating in traffic and outdoor activities “but not mentioning the control measures control and treatment of air pollution. <br /> “In case there is a need to go out, a mask or glasses”, Mr. Tai added. <br /> Severe air pollution is happening. lasted for days in Hanoi and Ho Chi Minh City, causing great concern and impact on people’s health. <br /> In the past few days, people in cities shared strong information on social media about Air pollution is measured t on the application of IQAir AirVisual software, an independent online air quality monitoring organization. <br /> AQI often shows red levels in bad (“unhealthy”), even purple, very unhealthy. Hanoi for many days topped the organization’s world’s worst air quality rankings, while HCMC also had many days in the top 10. <br /> For example, at 8:40 on 30 / 9, AQI index is 277, PM2.5 fine dust index is 11 times higher than national standards (25 µg / m3) and more than 25 times the annual average of the World Health Organization (WHO). < br /> WHO recommends safe PM2.5 dust level not exceeding 10 µg / m3. <br /> According to MONRE reports, citing data from 13 automatic monitoring stations, the quality is not Gas in Hanoi from 12-19 / 9 continuously has PM2.5 dust concentration in excess of the permitted level. <br /> In the most polluted days, all stations measured the average PM2.5 concentration of 24 hours. Exceeds the specified standard. <br /> However, this report indicates “the case ng others (NO2, O3, CO, SO2) is still within the limits “.