英文關鍵字
abandoned
air
background
biology
bottle
clean
closeup
concept
crisis
damage
danger
destruction
dirt
dirty
disaster
dump
ecological
ecology
environment
environmental
garbage
humans
industrial
industry
juice
junk
nature
nobody
outdoor
pack
paper
planet
plastic
polluted
pollution
problem
recycle
recycling
river
stream
trash
unhygienic
urban
waste
water