activist

aged

bag

care

clean

cleaning

collecting

cooperation

daughter

earth

eco

ecology

ecosystem

elderly

environment

environmental

family

father

female

five

forest

garbage

gesture

help

high

litter

male

man

nature

park

picking

pollution

preservation

project

protection

responsibility

rubbish

save

senior

smiling

social

teamwork

together

trash

volunteer

volunteering

waste

wildlife

woman

young