activity
agriculture
bag
bin
black
bottle
can
clean
cleanup
collect
collection
color
conservation
container
dirty
discard
disposal
dump
dumpster
dustbin
earth
ecology
empty
energy
environment
garbage
garden
green
hand
junk
keep
nature
object
outdoor
park
people
plastic
pollution
recycle
recycling
reduce
reuse
rubbish
save
separate
trash
volunteer
waste
water
world