英文關鍵字
aging
brown
city
clouds
composition
concept
earth
environment
environmental
factory
future
global
heat
houses
landscape
outdoors
people
planet
pollution
sky
smog
smoke
urban
warming
英文關鍵字
aging
brown
city
clouds
composition
concept
earth
environment
environmental
factory
future
global
heat
houses
landscape
outdoors
people
planet
pollution
sky
smog
smoke
urban
warming