機器
燃やす
black
carbon
carbon dioxide
carbon footprint
coal
coal mining
combustion
commodities
commodity
construction
conveyor belt
dig
digger
dirty
dust
earth
emissions
energy
equipment
excavator
fossil fuel
fossil fuels
fuel
geology
global warming
greenhouse effect
greenhouse gas
grey
heavy
industrial
industrialization
industry
machinery
material
mine
natural
ore
pile
pollution
power
processing
raw materials
sorting
transportation
transporting
work