Areas in the North on the issue often faced with haze cover. Most of the terrain, especially the Northern provinces. Chiang Mai, Chiang Rai, Lampang, Lamphun, Mae Hong Son, phayao, phrae, Nan, and because most northern community, located in a plain water which has high mountains as mountains and surrounding complex. It is a basin pan. Smog causes could not be diffuse. Mostly caused by burning forests to encroach the witness. For the benefit of individuals and groups of people and that there is too much until the control has not been attributed to the burning of agricultural waste materials to prepare areas in agriculture in the next season. There are also burned to get rid of the garbage in the city and suburban areas, it is essential to cause such a smog problem. So the conservation and knowledge of him. The impact caused by the specific health effects as those with respiratory diseases is increasing.