Smog Is air pollution caused by the burning of forests to air in Chiang Mai and affect health as well as population, or tourists in the province. So there are fewer tourists in this range.
It was a haze of air pollution caused by burning forests to air in Chiang Mai and affect the health of the population or tourists in the province. As a result, there are fewer tourists during this period.
Smog. The air pollution from burning forests to make the air in Chiang Mai and good health to Xinhua population or tourists in the province. The tourists were less in this period.