英文關鍵字
abandoned
bag
biodegradable
care
carelessness
city
clogging
concept
conservation
danger
dangerous
day
destruction
discarded
disposal
drifting
ecology
ecosystem
environment
environmental
fly
flying
garbage
global
grass
green
hazard
imminence
impedance
nature
outdoor
package
plastic
pollution
polyethylene
problem
recycle
recycling
red
road
rubbish
shop
street
summer
trash
waste
wastefree