英文關鍵字
action
beach
bin
bottle
can
cargo
city
clean
collector
concept
conservation
container
danger
dangerous
dirt
dirty
diseases
disposal
dispose
domestic
dump
dustcart
ecology
environment
environmental
equipment
factory
garbage
global
healthcare
heap
industrial
industry
junk
lifting
litter
machinery
man
messy
mud
nature
outdoor
pieces
plastic
pollute
pollution
protection
recovery
recycle
recycling
refuse
resource
reuse
river
rubbish
sanitation
save
scrap
separately
service
shore
shovel
smell
smelly
street
toxic
transportation
trash
truck
urban
vehicle
waste
water
work
worker