英文關鍵字
architecture
barrel
collect
collection
collector
conservation
container
cover
dirty
disposal
drain
drainage
earth
eco
ecology
energy
environment
environmental
friendly
garden
green
irrigation
maintenance
natural
nature
outdoors
pipe
plant
plastic
rain
rainwater
recycle
recycling
reservoir
reuse
sewerage
sources
store
structure
system
tube
wall
water