Browse through our collection of efficiency images and stock photos. They are all royalty-free and ready to use for your next project.

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409 stock photos

wind farm in coastal mud flat
$7
wind farm in coastal mud flat

wind farm in coastal mud flat

by chuyu2014

Arrow Goals Target Accuracy Purpose Copy Space Concept
$5
Arrow Goals Target Accuracy Purpose Copy Space Concept

Arrow Goals Target Accuracy Purpose Copy Space Concept

by Rawpixel

Sportsman during the medical examination
$5
Sportsman during the medical examination

Sportsman during the medical examination

by bialasiewicz

Windmills and sunflowers
$5
Windmills and sunflowers

Windmills and sunflowers

by viledevil

trays for papers on white background
$5
trays for papers on white background

trays for papers on white background

by photobalance

Wind turbine in the baltic sea. Renewable green energy. Finland
$5
Wind turbine in the baltic sea. Renewable green energy. Finland

Wind turbine in the baltic sea. Renewable green energy. Finland

by ABBPhoto

thermostatic valve on radiator close up
$5
thermostatic valve on radiator close up

thermostatic valve on radiator close up

by Vladdeep

Wind turbines generating electricity with blue sky - energy conservation concept
$5
Wind turbines generating electricity with blue sky - energy conservation concept

Wind turbines generating electricity with blue sky - energy conservation concept

by Satura_

Wind Turbine for alternative energy . Eco power concept
$5
Wind Turbine for alternative energy . Eco power concept

Wind Turbine for alternative energy . Eco power concept

by Satura_

sweet honey
$7
sweet honey

sweet honey

by jirkaejc

The true leadership.
$8
The true leadership.

The true leadership.

by Fisher-Photostudio

Energy saving SMD led light bulb
$5
Energy saving SMD led light bulb

Energy saving SMD led light bulb

by bogdandreava

Wind turbine generating electricity with blue sky - energy conservation concept
$5
Wind turbine generating electricity with blue sky - energy conservation concept

Wind turbine generating electricity with blue sky - energy conservation concept

by Satura_

Powerful and ecological energy concept - Windmill for electric power production
$5
Powerful and ecological energy concept - Windmill for electric power production

Powerful and ecological energy concept - Windmill for electric power production

by Satura_

surface of solar panel
$5
surface of solar panel

surface of solar panel

by start08

Geothermal Power Plant
$5
Geothermal Power Plant

Geothermal Power Plant

by FiledIMAGE

Yellow electric lightning bolt icon
$5
Yellow electric lightning bolt icon

Yellow electric lightning bolt icon

by Rawpixel

Fluorescent light bulb
$5
Fluorescent light bulb

Fluorescent light bulb

by ozaiachin

Compact Fluorescent Lightbulb
$5
Compact Fluorescent Lightbulb

Compact Fluorescent Lightbulb

by macropixel

Back View Studio Shot Of Three-Dimensional Black Sedan Family Ca
$9
Back View Studio Shot Of Three-Dimensional Black Sedan Family Ca

Back View Studio Shot Of Three-Dimensional Black Sedan Family Ca

by Rawpixel

Close-up of a man's hands highlighting text in book on the table
$9
Close-up of a man's hands highlighting text in book on the table

Close-up of a man's hands highlighting text in book on the table

by Wavebreakmedia

Car refueling on a petrol station close up
$9
Car refueling on a petrol station close up

Car refueling on a petrol station close up

by vlad_star

Doctor monitoring man on treadmill
$5
Doctor monitoring man on treadmill

Doctor monitoring man on treadmill

by bialasiewicz

Windmills
$5
Windmills

Windmills

by viledevil

Windmills
$5
Windmills

Windmills

by viledevil

Windmills
$5
Windmills

Windmills

by viledevil

Wind Turbine Green Energy Rain Weather Rainbow
$5
Wind Turbine Green Energy Rain Weather Rainbow

Wind Turbine Green Energy Rain Weather Rainbow

by Christopher_Boswell

Doctor monitoring parameters of sportsman
$5
Doctor monitoring parameters of sportsman

Doctor monitoring parameters of sportsman

by bialasiewicz

Runner on a treadmill
$5
Runner on a treadmill

Runner on a treadmill

by bialasiewicz

Energy saving fluorescent light bulb on white
$5
Energy saving fluorescent light bulb on white

Energy saving fluorescent light bulb on white

by ozaiachin