bag
clean
conservation
day
dirt
dirty
disposal
dump
dumping
eco
ecology
empty
environment
environmental
foil
forest
garbage
grass
gray
green
ground
heap
industry
junk
landfill
litter
nature
nobody
one
outdoor
packaging
park
picnic
picnickers
piece
pile
plant
plastic
pollute
pollution
problem
recycle
recycling
refuse
rubbish
street
toxic
trash
waste
white