CHIANG MAI, THAILAND - APRIL 24 : Unidentified people in the &quot;bye bye smog&quot; campaign to show their support to solve the smog crisis. at Three Kings Monument on April 24, 2016 in Chiang Mai, Thailand.
CHIANG MAI, THAILAND - APRIL 24 : Unidentified people in &quot;bye bye smog&quot; campaign to show their support solving the smog crisis. at Three Kings Monument on April 24, 2016 in Chiang Mai, Thailand.