英文關鍵字
chimney
factory
industry
environment
toxic
energy
air
electricity
smoke
sky
plant
climate
global
power
smog
warming
pipe
tower
coal
chemical
engineering
environmental
fuel
gas
manufacturing
steam
structure
dirty
fume
pollute
emission
technology
cloud
architecture
atmosphere
burn
cancer
chemistry
company
crisis
dangerous
diesel
problem
dioxide
station
exhaust