alloy

aluminum

background

bright

cargo

close

clothing

consumerism

detail

dump

eco

ecology

factory

fire

flat

garbage

heap

industrial

industry

iron

junk

leftover

litter

man

mess

metal

obsolete

polluted

pollution

pressed

processing

production

raw

recyclable

recycle

recycling

separation

sort

sparks

steel

technology

tool

tram

transportation

trash

uniform

welding

wheel

worker