Every year between February and April local farmers in Northern Thailand and neighboring countries burn huge amounts of vegetation to clear fields and get rid of agricultural waste. The result is a serious, regional smog problem that causes discomfort and health issues for millions of people.
In the recent years, the smog problem has seriously affected the Northern region, especially Chiang Mai province in various aspects. Smog problem has been classified as “serious” and “urgent” by Thai government since 2003. However, the problem is still unmanageable.
During this period, the Northern region is covered by fine particulate matters smaller than 10 microns higher than the safety standard. Level of particulate matters smaller than 10 microns reached the level that is harmful to people’s health. Some 2,200 residents were reportedly seeking medical treatment for smog-triggered illnesses.