black
brown
bulldozer
carme
coal
colore
construction
cutting
digging
dirt
dirty
earth
equipment
exploitation
fluid
fossil
fuel
generation
geology
gravel
heavy
industry
land
large
lignite
loading
machinery
metal
mine
mineral
mining
mover
nature
object
open
pit
power
quarry
removing
size
stacking
super
technology
transportation
truck
working