英文關鍵字
air
and
atmosphere
background
building
business
chemical
chemistry
chimney
city
climate
cloud
coal
contamination
damage
dioxide
dirty
disaster
ecology
emission
emissions
energy
environment
environmental
exhaust
factory
fuel
fume
gas
gases
global
harmful
health
high
industrial
industry
into
manufacture
manufacturing
nature
pipe
plant
plants
pollution
poor
power
production
sky
smog
smoke
smokestack
stack
steam
technology
tower
toxic
warming
waste
white