banner
basket
board
caution
clean
design
do
drop
dump
dumping
dustbin
environment
forbidden
garbage
icon
illustration
image
isolated
keep
label
litter
littering
man
no
person
pictogram
placard
please
pollution
recycle
refuse
restricted
rubbish
sign
silhouette
stamp
sticker
symbol
throw
throwing
tidy
trash
use
warning
waste
white
yellow