英文關鍵字
building
chimney
city
climate
cloud
damage
dioxide
dirty
ecology
emissions
environment
environmental
factory
fumes
garbage
industrial
manufacturing
nature
pipe
plant
pollution
sky
smog
smoke
英文關鍵字
building
chimney
city
climate
cloud
damage
dioxide
dirty
ecology
emissions
environment
environmental
factory
fumes
garbage
industrial
manufacturing
nature
pipe
plant
pollution
sky
smog
smoke