英文關鍵字
plastic
glass
cup
pollution
contamination
rubbish
environment
environmental
hazard
waste
grass
pollute
defilement
park
foliage
leaves
autumn
fall
fallen
used
ground
litter
garbage
land
earth
city
urban
covered
white
sunset
dusk
nature
outdoor
outside
closeup
close
view
macro
detail
problem
care
bottle
dirty
ecology
tree
picnic
ejected
discarded
throw