英文關鍵字
air
atmosphere
auto
automobile
breakdown
breathe
car
carbon
child
city
cleanliness
closeup
co2
damage
detail
dioxide
dirty
ecology
emission
emissions
engine
environment
environmental
exhaust
family
fumes
gasoline
harmful
lungs
malfunction
motor
oxygen
people
person
pipe
poison
pollution
repair
smog
smoke
tailpipe
toxic
traffic
transport
transportation
unhealthy
vehicle
walk