07/01/2020
Air quality index (AQI) is a measure used for reporting the daily air quality, by factoring the level of pollutants in the air. Different countries use different indices for measuring air quality by monitoring some or all of the following pollutants: carbon monoxide, PM2.5, PM10, Nitrogen dioxide, ground Ozone (O3), sulphur dioxide among others.
Sensitive groups, including children, the elderly and people with respiratory and cardiovascular problems are advised not to take part in any outdoor activities
Factories that emit large amounts of pollutants are ordered to shut down or cut production. People are also encouraged to use public transport to reduce vehicle emissions. This has happened severally in Vietnam where the authorities have increased their efforts to bring Vietnam pollution to manageable levels.
People are asked to wear protective masks to avoid breathing in pollutants, particularly PM2.5 and ground ozone.
