英文關鍵字
aerial
air
atmosphere
business
chemical
chemistry
chimney
climate
coal
concepts
dirty
distillery
ecology
ecosystem
emission
energy
environ
environment
environmental
factory
fuel
gas
global
greenhouse
healthy
heavy
industrial
industry
metal
night
oil
petrochemical
petroleum
pipe
plant
pollution
power
production
refinery
silhouette
sky
smog
smoke
smokestack
smokestacks
stack
station
sunset
technology
top
tower
toxic
vapor
view
warming
water