英文關鍵字
bag
bottle
broken
city
climate
container
day
dirt
dirty
dump
earth
ecological
ecology
ecosystem
environment
environmental
food
garbage
glass
global
ground
hazard
human
junk
landscape
metal
nature
neglect
object
outdoor
paper
park
pedestrian
people
pile
plastic
pollute
pollution
preserve
problem
problems
recycle
recycling
rubbish
spring
trash
tree
view
waste