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Energy efficiency

tumblr background

man holding incandescent bulb

wind turbine surrounded by grass

time lapse photography of square containers at night

photo of three solar panels

photo of outer space

a wind turbine on top of a tree

gray GE volt meter at 414

blue solar panels on green grass field under white clouds and blue sky during daytime

windmill on grass field during golden hour

three white windmill during daytime

a row of wind turbines in a green field

wind turbine surrounded by grass

time lapse photography of square containers at night

photo of three solar panels

light bulb illustration

a wind turbine on top of a tall tree

white windmills on green grass field under white clouds and blue sky

low angle photography of transmitter tower

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