aerial

big

black

bucket

capacity

carbon

coal

conveyor

copper

crane

cut

dig

dirt

dirty

drilling

drone

earth

energy

engine

equipment

excavator

extracts

field

fossil

fuel

geology

giant

ground

heavy

horizontal

huge

hydraulic

industrial

industry

large

loader

machine

machinery

mine

miner

mineral

mining

open

pit

plant

power

production

quarry

rock

shearer

technology

that

transportation

tunnel

underground

urban

wheel