英文關鍵字
air
atmosphere
auto
automobile
bumper
car
carbondioxide
climate
co2
condensate
destruction
diesel
dioxide
drop
ecology
economic
economical
efficient
electric
emission
engine
environment
environmental
exhaust
fuel
gas
gases
gasoline
global
hot
hybrid
light
metal
millage
motor
muffler
pipe
pollution
rear
rust
rusty
smoke
steam
tail
tailpipe
toxic
transportation
travel
warming
waste