英文關鍵字
air
atmosphere
black
car
carbondioxide
change
city
climate
combustion
control
crisis
danger
dark
diesel
dirty
disaster
drive
ecology
effect
environment
exhaust
fuel
gas
gasoline
global
greenhouse
health
hydrocarbon
industry
medical
medicine
negative
oxide
pickup
pipe
pm10
pm25
poison
poisoning
polluted
pollution
risk
road
safe
smog
smoke
town
toxic
traffic
transport
transportation
truck
vehicle
warming