英文關鍵字
air
atmosphere
blue
business
carbon
chemical
chimney
city
climate
cloud
coal
dioxide
dirty
ecology
electricity
emission
energy
environment
environmental
exhaust
factory
fuel
fume
fumes
gas
generation
global
industrial
industry
manufacturing
nature
pipe
plant
pollution
power
refinery
sky
smog
smoke
smokestack
stack
station
steam
technology
tower
toxic
tube
vapor
warming
white