Air pollution is a big problem in Thailand, especially during February to April. The pollution makes many people sick, it harms the environment, and it also affects the tourism industry. Let's send this letter to pressure the mayor of Chiang Mai to take action on air pollution. Air pollution has been an enormous challenge for us. It can not be solved by one person, but it requires the unity of all people. Together, we have to try our best to stop it.

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