environmental
air
blue
chemical
city
clear
co2
company
cooling
dioxide
dioxin
distill
distillation
distillery
energy
environment
equipment
factory
fuel
gas
gasoline
global
industrial
industry
japan
japanese
kawasaki
line
manufacture
metal
oil
petrol
pipe
plant
power
production
refine
refinery
scene
sky
stack
station
steel
system
technology
tower
warming
working