aerial

asbestos

bin

coal

copper

dig

digger

earth

energy

engineering

environment

environmental

equipment

extraction

former

fossil

fuel

gear

geological

geologist

geology

heavy

horizontal

industrial

industry

island

line

load

machinery

mechanical

mine

minerals

miners

natural

nonrenewable

outdoors

outside

pile

pit

resource

rock

ropeway

shovel

site

stone

strip

transport

transportation

truck

workers