background
bin
care
caucasian
character
clean
clothes
concept
conservation
contamination
courage
earth
eco
ecology
environment
fight
garbage
global
green
grey
hero
light
litter
male
man
nature
people
person
pollution
power
prevention
protection
recycling
reduction
renewable
resources
responsibility
reuse
rubbish
save
sign
strength
super
superhero
trash
tshirt
waste
world