blurry backdrop of chiang mai's cityscape filled with burning

aerial air pollution architecture asia background bangkok building buildings business city cityscape danger dirty downtown dust environment fog hazardous haze health high landmark landscape metropolis mist modern office outdoor pm25 problem respiratory system sky skyline skyscraper smog smoke sunrise sunset thailand tourism tower travel unhealthy urban view blurry backdrop chiang mai#39aph39#s filled burning caused wildfires dry season levels exceed health-related safety standards