Some of the hazardous PM2.5 plaguing Bangkok may be the result of crop burning in Cambodia, but officials stress vehicles are still the main cause.
“Most of the PM2.5 in Bangkok comes directly come from vehicles in the city and our activities are to be blamed, yet according to research, some of the haze is from neighbouring countries,” Siwat Phongpiachan, chief of the Centre Research and Development of Disaster Prevention and Management at National Institute of Development Administration (Nida), told the Bangkok Post in a phone interview.
In full: https://www.bangkokpost.com/news/general/1617894/foreign-haze-contributing-to-pollution
