Panning across bridge over boat dock and marina small boats anchored at waterfront cityscape high rise buildings and a bridge in the background

boat dock marina boats anchored waterfront cityscape highrise buildings pollution air quality carbon dioxide fresh air carbon monoxide oxygen toxic pollutants chemicals allergy allergic contaminate sustainability sustainable sustainable growth economic competitive ecology environmental balance equilibrium natural resources good practice biology diversity future generation bio diversity city urban town architecture concrete building architectural structure downtown skyline brick outdoors