We have reservations for a week in Chiang Mai in late March. Lately, I have read reports about how bad the air quality becomes at that time due to large scale burning of fields in rural areas. Some say the air is bad, some say not so bad as a result. This is a big deal for us and a bit unexpected(shame on us for not knowing). What is the answer? How concerned should we be about air quality? Thanks in advance for your advice.