above

aerial

air

atmosphere

boiler

building

chemical

chimney

city

climate

coal

conditions

cooling

damage

danger

dioxide

drone

ecology

energy

environment

environmental

exhaust

factory

garbage

global

heating

humanity

industrial

industry

landscape

manufacturing

metallurgical

nature

near

pipes

plant

pollution

poor

river

sky

smog

smoke

smoking

stack

station

territory

toxic

urban

view

zone