BANGKOK – Artificial rain helped improve air quality in Bangkok even as pollution levels remain above safe limits prescribed by the World Health Organization (WHO), official sources said Wednesday.
Earlier during the week, the air quality index (AQI) in Bangkok had climbed to 161, classified unhealthy and potentially harmful to vulnerable groups like children, the elderly and people with respiratory problems.
Sources from the Pollution Control Department told EFE that artificial rain with the help of planes equipped with special technology, along with natural precipitation on Tuesday helped bring down air pollution to a certain extent.
The project to create artificial rain using chemical products and other techniques using a plane is set to continue at least until Friday.
According to the department, the AQI in Bangkok was 129 on Wednesday, whereas PM2.5 levels – which indicate the number of particles smaller than 2.5 microns – reached a high of 62 micrograms per cubic meter.
Thai authorities consider PM2.5 levels below 50 to be safe, while the World Health Organization recommends a maximum level of 25.
The air has become increasingly hazardous in Thailand in recent years due to the increase in farmers burning crop residue, industrial activity, construction and vehicular traffic.