英文關鍵字
air
atmosphere
background
building
carbon
chemical
chimney
climate
cloud
co2
coal
construction
damage
danger
dioxide
dirty
ecology
emission
emissions
energy
environment
environmental
exhaust
factory
fog
fumes
gas
global
industrial
industry
manufacturing
nature
pipe
plant
polluting
pollution
power
refinery
sky
smog
smoke
smokestack
stack
steam
technology
toxic
vapor
warming