英文關鍵字
bag
bottle
care
clean
cleaning
community
disposal
earth
eco
ecological
ecology
ecosystem
environment
environmental
friendship
garbage
green
group
hand
job
lifestyle
litter
man
natural
nature
outdoor
package
park
people
person
plastic
pollution
recycle
recycling
reuse
rubbish
social
summer
team
teenager
trash
voluntary
volunteer
volunteering
walking
waste
woman
work
young