英文關鍵字
air
atmosphere
auto
automobile
automotive
bike
bumper
car
carbon
catalytic
change
chimney
city
climate
combustion
contamination
converter
damage
day
diesel
dioxide
dirty
drive
driver
dust
earth
eco
ecology
emission
energy
engine
environmental
euro6
exhaust
fumes
gas
gasoline
global
health
motor
nature
polluter
pollution
power
renovation
smoke
superbike
time
traffic
transport
transportation
vehicle
warming