unity
activist
baby boomer
campaign
care
citizen
cleaning
communication
concern
conservation
cooperation
earth
eco
eco friendly
ecological
ecology
ecosystem
enthusiast
environment
environmental
garbage
global
green
help
interaction
landscape
lifestyle
litter
littering
nature
outdoors
park
pensioner
planet
plastic
pollution
problem
recycling
rubbish
scavenger
selective focus
service
social
solidarity
sunlight
support
volunteer
volunteering