英文關鍵字
air
atmosphere
automobile
car
co2
combustion
contamination
dirty
eco
ecology
environment
environmental
fuel
fumes
industry
oxide
pipe
poison
poisoning
pollution
polution
problem
smog
smoke
soot
toxic
vehicle
英文關鍵字
air
atmosphere
automobile
car
co2
combustion
contamination
dirty
eco
ecology
environment
environmental
fuel
fumes
industry
oxide
pipe
poison
poisoning
pollution
polution
problem
smog
smoke
soot
toxic
vehicle