機器
燃やす
africa
black
carbon
coal
combustion
commodities
commodity
dig
digger
dirty
earth
effect
emissions
energy
equipment
excavate
excavator
footprint
fossil
fuel
gas
geology
global warming
greenhouse
heavy
industrial
industry
machinery
material
mine
open
ore
pit
pollution
power
processing
raw
site
south africa
tip
transportation
transporting
truck
vehicle
work