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    View on Windmill at sunset — Stock Photo
    View on Windmill at sunset
    Hover Dam Complex on Colorado River, Nevada, USA — Stock Photo
    Hover Dam Complex on Colorado River, Nevada, USA
    Young girls and boys in a classroom — Stock Photo
    Young girls and boys in a classroom
    Women watching girl run in sunny meadow with wildflowers — Stock Photo
    Women watching girl run in sunny meadow with wildflowers
    Wind mills at a wind farm during daytime — Stock Photo
    Wind mills at a wind farm during daytime
    Wind power turbines — Stock Photo
    Wind power turbines
    Wind turbines spinning in rural landscape — Stock Photo
    Wind turbines spinning in rural landscape
    Windmill on the road in bright sunlight with blue sky — Stock Photo
    Windmill on the road in bright sunlight with blue sky
    Boy and girl on a science lesson — Stock Photo
    Boy and girl on a science lesson
    Men sitting eating at a diner. — Stock Photo
    Men sitting eating at a diner.
    Solar panels feed energy to the power grid. — Stock Photo
    Solar panels feed energy to the power grid.
    Windmills along river — Stock Photo
    Windmills along river
    Wind turbines in field — Stock Photo
    Wind turbines in field
    Side view of a young athletic Caucasian man exercising in a city park in the evening, with a headlight on resting during a break with defocused city lights in the background — Stock Photo
    Side view of a young athletic Caucasian man exercising in a city park in the evening, with a headlight on resting during a break with defocused city lights in the background
    Low angle view of power lines under blue sky — Stock Photo
    Low angle view of power lines under blue sky
    Smiling little boy holding lollipop — Stock Photo
    Smiling little boy holding lollipop
    Boy standing in a corn field, USA — Stock Photo
    Boy standing in a corn field, USA
    Couple sitting on a sofa — Stock Photo
    Couple sitting on a sofa
    Power engineer at solar photovoltaic array — Stock Photo
    Power engineer at solar photovoltaic array
    Aerial view of lake Mooserboden and dam wall, Kaprun High Mountain reservoirs, Salzburg, Austria — Stock Photo
    Aerial view of lake Mooserboden and dam wall, Kaprun High Mountain reservoirs, Salzburg, Austria
    Excited little sisters in casual wear lying on comfy bed and raising arms happily while singing favorite song together — Stock Photo
    Excited little sisters in casual wear lying on comfy bed and raising arms happily while singing favorite song together
    Boy sitting in a car — Stock Photo
    Boy sitting in a car
    Friends in the swimming pool — Stock Photo
    Friends in the swimming pool
    From above view of modern hydroelectric power station with reservoir river in green hills — Stock Photo
    From above view of modern hydroelectric power station with reservoir river in green hills
    Kaheawa Wind Power wind farm situated in the West Maui Mountains catches trade winds blowing through Maui's Isthmus valley; Maui, Hawaii, United States of America — Stock Photo
    Kaheawa Wind Power wind farm situated in the West Maui Mountains catches trade winds blowing through Maui's Isthmus valley; Maui, Hawaii, United States of America
    Wind farm in Northern India; Rajasthan, India — Stock Photo
    Wind farm in Northern India; Rajasthan, India
    Wind mills at a wind farm during dusk — Stock Photo
    Wind mills at a wind farm during dusk
    Various computers at desk in solar station office — Stock Photo
    Various computers at desk in solar station office
    Full length smiling mature female in sportswear and boxing gloves standing with helmet in hand against blue wall and looking at camera — Stock Photo
    Full length smiling mature female in sportswear and boxing gloves standing with helmet in hand against blue wall and looking at camera
    Side view of a young athletic Caucasian man exercising on a footbridge in a city, running and listening to music with earphones on — Stock Photo
    Side view of a young athletic Caucasian man exercising on a footbridge in a city, running and listening to music with earphones on
    Male worker using digital tablet at solar station on a sunny day — Stock Photo
    Male worker using digital tablet at solar station on a sunny day
    Farmer closely inspecting a solar panel — Stock Photo
    Farmer closely inspecting a solar panel
    Tween boy sitting in home working on tablet while sitting in chair — Stock Photo
    Tween boy sitting in home working on tablet while sitting in chair
    Workers standing on wind turbine in rural landscape — Stock Photo
    Workers standing on wind turbine in rural landscape
    Mature female in sportswear and boxing gloves standing with helmet against blue wall and looking at camera — Stock Photo
    Mature female in sportswear and boxing gloves standing with helmet against blue wall and looking at camera
    Rear view of male worker using machine at solar station — Stock Photo
    Rear view of male worker using machine at solar station
    Row of solar panels at solar farm in North Wales, UK. — Stock Photo
    Row of solar panels at solar farm in North Wales, UK.
    Side view of a young athletic Caucasian man exercising on a footbridge in a city, listening to music with earphones on drinking water during a break — Stock Photo
    Side view of a young athletic Caucasian man exercising on a footbridge in a city, listening to music with earphones on drinking water during a break
    Anonymous cheerful elderly female in activewear in boxing gloves against blue wall — Stock Photo
    Anonymous cheerful elderly female in activewear in boxing gloves against blue wall
    Energetic ethnic woman in wireless headphones and trendy clothes dancing hip hop with open mouth — Stock Photo
    Energetic ethnic woman in wireless headphones and trendy clothes dancing hip hop with open mouth
    Boy and girl on a science lesson — Stock Photo
    Boy and girl on a science lesson
    Front view of a young athletic Caucasian man exercising in a city park in the evening, stretching on a bench with a headlight on — Stock Photo
    Front view of a young athletic Caucasian man exercising in a city park in the evening, stretching on a bench with a headlight on
    Unconventional woman with modern hairstyle standing against wall with baseball bat behind head and looking away illuminated by red and blue at city street — Stock Photo
    Unconventional woman with modern hairstyle standing against wall with baseball bat behind head and looking away illuminated by red and blue at city street
    Children using a microscope. — Stock Photo
    Children using a microscope.
    A man jumps into the air in front of mountain landscape — Stock Photo
    A man jumps into the air in front of mountain landscape
    Wind turbines spinning in rural landscape — Stock Photo
    Wind turbines spinning in rural landscape
    Scientist examining solar panel in rural landscape — Stock Photo
    Scientist examining solar panel in rural landscape
    Adorable preschool boy in casual tee shirt looking away while raising arm playing finger games leaning in a white wall background — Stock Photo
    Adorable preschool boy in casual tee shirt looking away while raising arm playing finger games leaning in a white wall background
    Excited little sisters in casual wear lying on comfy bed and raising arms together looking at camera — Stock Photo
    Excited little sisters in casual wear lying on comfy bed and raising arms together looking at camera
    Strong Woman Using Kettlebell In Gym — Stock Photo
    Strong Woman Using Kettlebell In Gym
    Two children using a microscope — Stock Photo
    Two children using a microscope
    Offshore wind farm — Stock Photo
    Offshore wind farm
    Couple walking on dirt road by field — Stock Photo
    Couple walking on dirt road by field
    Full body of African American teen girl performing urban dance movement in bright studio — Stock Photo
    Full body of African American teen girl performing urban dance movement in bright studio
    Front view of a shirtless young athletic Caucasian man exercising on a footbridge in a city, stretching with a leg on the handrail — Stock Photo
    Front view of a shirtless young athletic Caucasian man exercising on a footbridge in a city, stretching with a leg on the handrail
    Adorable little boy holding flashlight — Stock Photo
    Adorable little boy holding flashlight
    Wind turbines in hillside landscape — Stock Photo
    Wind turbines in hillside landscape
    Wind turbines on Wind Farm, Albany, Australia — Stock Photo
    Wind turbines on Wind Farm, Albany, Australia
    Girl and boys in a classroom — Stock Photo
    Girl and boys in a classroom
    White electric vehicle in charge — Stock Photo
    White electric vehicle in charge