aerial
building
chemical
chimney
clouds
concrete
contamination
cooling
dangerous
day
ecology
electricity
engineer
environment
equipment
evaporation
facility
field
fuel
gas
generate
global
gray
high
industry
manufacturing
modern
nobody
petroleum
pipe
piping
plant
pollute
power
risk
salou
smog
smoke
spain
storage
structure
tank
technology
thick
tube
voltage
warming
weather