英文關鍵字
air
ambient
atmosphere
auto
automobile
car
carbon
co2
damage
danger
diesel
dioxide
dirty
driveway
driving
ecology
emission
emit
energy
engine
environment
environmental
exhaust
fuels
fumes
gas
gasoline
global
machine
motoring
output
outtake
pollution
power
rattle
rev
road
run
smog
smoke
sound
toxic
transportation
truck
vapor
vehicle