英文關鍵字
background
beach
beautiful
blue
bottle
clean
cleaning
cleanup
coast
collect
concept
dirty
eco
ecology
ecosystem
environment
environmental
garbage
greening
help
holiday
issues
job
landscape
natural
nature
ocean
organization
outdoor
pebble
people
person
picking
planet
plastic
pollution
problem
recycling
rock
rubbish
sand
sea
seascape
seashore
shore
sky
stone
summer
texture
trash
travel
vacation
view
voluntary
volunteer
waste
water
wave
youth