英文關鍵字
air
atmosphere
blue
british
building
carbon
chimney
city
coal
danger
dangerous
day
dirty
ecology
electricity
energy
england
environment
environmental
exhaust
factory
fired
fume
generation
global
green
industrial
industry
nature
pipe
plant
pollute
pollution
power
problem
sky
smog
smoke
station
steam
technology
terrible
tower
toxic
tree
unhealthy
warming
white