英文關鍵字
air
atmosphere
building
business
carbon
causing
chemical
chemistry
chimney
climate
cloudy
coal
construction
contamination
danger
dioxide
dirty
ecology
emission
energy
environment
environmental
exhaust
factory
fuel
fumes
gas
global
greenhouse
industrial
industry
manufacturing
metal
pipe
plant
pollution
power
production
refinery
sky
smog
smoke
station
steam
technology
tower
toxic
vapor
warming
waste