aluminum
bin
brown
canned
cardboard
cares
cheerful
class
conservation
consumerism
container
dog
echo
ecology
education
empty
energy
enjoyment
environment
environmental
friendship
garbage
help
junk
leisure
litter
material
metal
other keywords
outside
paper
pollution
recreation
recyclable
recycle
recycling
reduce
relaxation
reusable
reuse
rough
save
savings
scrap
sustainable
team work
trash
use
useful
waste