air
atmosphere
background
billowing
business
chimney
climate
cloud
coal
complex
dark
dioxide
dirty
dusk
ecology
ehime
energy
environment
evening
exhaust
facilities
factory
global
heavy
industrial
industrial area
industrial zone
industry
isolated
japan
leaden skies
nightfall
niihama
ozone
plant
pollution
power
production
refinery
scenery
shikoku
sky
smog
smoke
smokestack
steam
tower
view
vomit
white