abstract
background
blue
care
clean
concept
conservation
conserve
design
dribble
drink
drip
drop
earth
eco
ecological
ecology
economize
energy
environment
faucet
flat
flow
friendly
green
hand
icon
illustration
isolated
leak
life
liquid
nature
off
pipe
preserve
protect
purity
recycle
recycling
save
supply
tap
tap water
turn
turn off
valve
wash
water