英文關鍵字
above
activity
aerial
air
burning
dirty
drone
dump
dumping
ecological
ecology
ecosystem
environment
environmental
fire
garbage
heap
illegal
industrial
industry
junk
landfill
litter
machine
nature
outdoors
plastic
pollute
pollution
poverty
recycling
refuse
rubbish
scavenger
scrap
smell
smoke
trash
view
waste
work
worker