Aerial drone shot flying over Cheonan city covered in smog pollution, South Korea

aerial drone fly over above cheonan cheonansi chungcheong pyeongtaek seoul south korea korea asia city building built up area smog fog dust pollution dirty unhealthy air pollution smoke unsafe populated high population densely populated high rise highrise skyscraper modern neomodern architecture fossil fuels dirty energy deadly dangerous climate change global warming horizon panorama wide landscape cityscape skyline