automatic

automation

bag

built

business

clay

conservation

consumerism

conveyer

conveyor

destruction

dirt

dump

eco

ecology

environment

environmental

equipment

factory

garbage

global

grit

heavy

industrial

industry

instrument

line

machine

machinery

manufactory

manufacture

mechanical

messy

metal

nature

operation

pile

plant

plastic

pollution

process

production

recycle

recycling

sand

scrap

technology

tile

trash

waste