燃やす
adaptability
adapted
air
background
blue
building
business
chemical
chimney
city
coal
construction
ecological
ecology
emissions
energy
environment
equipment
factory
fuel
gas
global
green
industrial
industry
landscape
metal
nature
new
pellets
pipe
plant
pollution
power
sky
skyline
smog
smoke
station
steam
steel
sunrise
technology
thermal
tower
warming
white
willow
york