利用する
contamination
cycle
debris
dirt
disposal
disposition
dust
eco
ecology
eject
environment
exploitation
forest
garbage
item
junk
life
litter
nature
object
old
plant
pollute
pollution
possession
problem
protection
recyclable
recycle
recycling
refuse
removal
reprocess
rubbish
service
soiling
stuff
sunny
sunset
sunshine
thing
time
trash
tree
usage
use
utilisation
utilization
waste