英文關鍵字
clean
crushed
dirty
dump
ecology
environment
environmental
equipment
facility
factory
garbage
industrial
junk
junkyard
landfill
litter
lots
machine
machinery
metal
objects
old
paper
pile
plant
plastic
polluted
pollution
processing
recycle
recycling
refuse
renewable
reuse
rubbish
scrap
sort
spin
sustainability
sustainable
technology
trash
used
waste
working