By The Nation
“We learned a lesson last year, and have implemented short, medium and long-term measures early this year. We’re also monitoring external factors such as smog from neighbouring countries. We’ve been alert at all times,” he said.
He added that if PM2.5 dust particles exceed the safe limit, the authorities will convene again to seek better solutions. However, he believes Chiang Mai is well prepared to handle the situation.
PM2.5 refers to particulate matter that is less than 2.5 micrometres in diameter. Thailand’s safe threshold for PM2.5 is 50 micrograms per cubic metre of air, while the World Health Organisation has set it at 25mcg per cubic metre.