The best solution is not a single solution. Instead, I want to suggest doing four things together to help solve Chiang Mai's pollution problems. The first and most important is to regulate the burning of big corporate farms. They cover huge tracts of land in the mountainous regions of the North, and when they are burn off corn and other crop waste, the smoke ends up in the valleys. Big Agro is a large contributor to the smog we see in Chiang Mai, and they need to be stopped through strict government regulations. The next solution to the problem would be to create a mass marketing campaign that includes all sectors of society such as print, television, social media, roadside signs and workshops in remote villages in order to educate local small-scale farmers about the consequences of burning and environmentally sound and cost effective alternatives. This campaigns should start immediately and should run for several years. The third thing that should be done is a major research effort in cultivating the local mushroom (known as "hed top") in a controlled environment. As of now, it is impossible to grow this mushroom in a farm setting, funds should be given to research to make it possible. Once it can successfully be grown by farmers, the government should give heavy subsidies to farmers to grow the mushroom, driving up the price of wildly cultivated mushrooms to the point where it is not feasible to buy anymore. Lastly solution to solve the pollution problem would be to work with neighboring countries to control burning. Thailand should be willing to send manpower, materials and money to help our neighbors control fires and dramatically reduce and/or eliminate burning. If these four steps are done, the smog problem will not be solved immediately, but will dramatically reduce within the next few years. We need long-term solutions, not quick fixes that will be forgotten.