city view and sky show smog air pollution smog city from pm 2.5 dust,

air quality allergy asia asian bad bangkok building carbon dioxide cardiopathy city landscape cityscape climate concept dangerous direct danger dust environment factory fog frustrated global hazard health heart disease industry lung mist outdoor particle pollution people pneumonia polluted problem protection respiratory serious smog smoke symbol text thailand toxic trouble unhealthy urban warning yellow background view sky show 2 5 buildings weather smoke combustion car exhaust pipes