acid

air

and

architecture

brown

building

buildings

business

carbon

chimney

cloud

cloudscape

coal

condensation

cooling

damage

dioxide

electricity

energy

environment

environmental

exterior

factory

fired

fog

fuel

fumes

generation

germany

global

growth

heavy

industry

large

lignite

line

manufacturing

mid

nature

oil

pollution

power

pump

pylon

rafinery

rain

smog

smoke

stack

stacking

station

steam

substance

tall

tower

toxic

warming