environmental
balance
bill
bulb
care
caring
cfl
conservation
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consume
consumer
consuming
consumption
cost
eco
ecological
economic
economical
economize
economy
efficiency
efficient
electric
electrical
electricity
energy
environment
fluorescent
friendly
future
green
helical
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home
house
household
incandescent
lamp
less
light
lighting
low
lower
lowering
money
monthly
power
reduce
reducing
responsibility
responsible
save
saving
spiral
technology
twist
twisted
usage
white