英文關鍵字
air
auto
automobile
car
carbon
city
climate
co2
damage
detail
diesel
dioxide
dirty
driving
emission
emissions
energy
engine
environment
environmental
exhaust
fuel
fumes
gas
gasoline
global
industry
money
monoxide
motor
motoring
muffler
oil
pipe
pollution
power
road
smog
smoke
soot
tailpipe
technology
traffic
transport
transportation
vehicle