Vertical fly by at the Citic Bank International Tower revealing the Changsha cityscape in Hunan Province with a hazy sky and residential buildings

china changsha hunan province cityscape misty foggy urban pollution environment smog skyline city atmosphere visibility urban pollution air quality fog mist chinese downtown city view haze modern changsha skyline city smog central china foggy city cityscape pollution air pollution urban haze environmental concern metropolitan overcast misty skyline foggy skyline sky environmental impact urban planning climate aerial view hazy river bridge highrise daytime buildings rooftops riverside banks