英文關鍵字
litter
environment
trash
waste
clean
pick
man
nature
pollution
preserve
conservation
civic
sustainability
environmental
volunteer
park
path
picker
rubbish
garbage
picking
pickup
collect
kind
nice
good
activity
dedication
social
initiative
lifestyle
cleanliness
service
effort
improvement
environmentalism
awareness
issue
recycling
outdoors
real
people
planet
cleaning
ecology
ecological
symbolism
responsibility
caring