機器
conservation
contamination
conveyor
dirty
disposal
dump
eco
ecology
environment
facility
factory
garbage
heap
indoors
industrial
industry
junk
pile
plant
plastic
pollution
process
processing
production
recycle
recycled
recycling
renewable
resource
reuse
rubbish
salvaging
scrap
scrapyard
separating
separation
stack
storage
sustainable
trash
waste