燃やす
air
blue
building
business
carbon
chemical
chemicals
chimney
chimneys
climate
coal
construction
contamination
damage
dioxide
dirty
ecology
electrical
electricity
emissions
energy
environment
europe
exterior
factory
fuel
fumes
gas
global warming
gray
harmful
industrial
industry
manufacturing
outdoors
ozone
plant
pollution
power
production
sky
smog
smoke
steam
technology
tower
toxic
vapor
white