air
atmosphere
carbon dioxide
chemical
chimney
chimney smoke
climate
cloud
coal
dirty
ecological
ecology
emission
emissions
energy
environment
factory
fuel
gas
global
industrial
industry
landscape
nature
pipe
pollution
power
production
sky
smog
smoke
smoke emission
stack
technology
thermal
tower
toxic
warming
waste
定額
Three factory chimneys emit puffs of smoke against the blue sky. The concept of air pollution, environment, industry and ecology, global warming.の素材 [FY310189492759]
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