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    Children Green Science Fair event. — Stock Photo
    Children Green Science Fair event.
    Engineers using walkie-talkie and digital tablet at solar power plant — Stock Photo
    Engineers using walkie-talkie and digital tablet at solar power plant
    Portrait confident engineers at alternative energy power plant — Stock Photo
    Portrait confident engineers at alternative energy power plant
    Wind turbine energy generators on wind farm — Stock Photo
    Wind turbine energy generators on wind farm
    Wind turbines in distance beyond bay, Morecambe Bay, UK — Stock Photo
    Wind turbines in distance beyond bay, Morecambe Bay, UK
    Male engineer with walkie-talkie repairing solar panel at power plant — Stock Photo
    Male engineer with walkie-talkie repairing solar panel at power plant
    Wind turbines on a wind farm, East Frisia, Lower Saxony, Germany — Stock Photo
    Wind turbines on a wind farm, East Frisia, Lower Saxony, Germany
    Wind turbines on hilltop during daytime — Stock Photo
    Wind turbines on hilltop during daytime
    Scenic view of Windmill Riekermolen; Amsterdam, Netherlands — Stock Photo
    Scenic view of Windmill Riekermolen; Amsterdam, Netherlands
    Boy under a Green Science Fair — Stock Photo
    Boy under a Green Science Fair
    Wind turbines on a hilly landscape on a wind farm; Washington, United States of America — Stock Photo
    Wind turbines on a hilly landscape on a wind farm; Washington, United States of America
    Wind turbine amongst olive trees; Campillos, Malaga, Andalucia, Spain — Stock Photo
    Wind turbine amongst olive trees; Campillos, Malaga, Andalucia, Spain
    Female engineers talking, examining solar panels at power plant — Stock Photo
    Female engineers talking, examining solar panels at power plant
    Hover Dam Complex on Colorado River, Nevada, USA — Stock Photo
    Hover Dam Complex on Colorado River, Nevada, USA
    Engineers lifting solar panel at sunny power plant — Stock Photo
    Engineers lifting solar panel at sunny power plant
    Portrait smiling, confident engineers at sunny power plant — Stock Photo
    Portrait smiling, confident engineers at sunny power plant
    Old wooden windmill on top of structure with blue sky; Leiden, Netherlands — Stock Photo
    Old wooden windmill on top of structure with blue sky; Leiden, Netherlands
    Close-up of the base of three old wooden windmills in a row along a grassy field with sheep grazing on a grassy hillside, near Stompwijk; Netherlands — Stock Photo
    Close-up of the base of three old wooden windmills in a row along a grassy field with sheep grazing on a grassy hillside, near Stompwijk; Netherlands
    Engineer with walkie-talkie inspecting solar panels at power plant — Stock Photo
    Engineer with walkie-talkie inspecting solar panels at power plant
    Engineers discussing paperwork at alternative energy power plant — Stock Photo
    Engineers discussing paperwork at alternative energy power plant
    Wind turbines in field — Stock Photo
    Wind turbines in field
    Wind turbine energy generators on wind farm — Stock Photo
    Wind turbine energy generators on wind farm
    Workers watching wind turbine at power plant — Stock Photo
    Workers watching wind turbine at power plant
    Children at a Green Science Fair event — Stock Photo
    Children at a Green Science Fair event
    Portrait confident engineer installing solar panels on sunny rooftop — Stock Photo
    Portrait confident engineer installing solar panels on sunny rooftop
    Scenic view of Solar photovoltaic array — Stock Photo
    Scenic view of Solar photovoltaic array
    Engineers reviewing plans at turbine power plant — Stock Photo
    Engineers reviewing plans at turbine power plant
    Wind turbines in Northern New York; Lowville, New York, United States of America — Stock Photo
    Wind turbines in Northern New York; Lowville, New York, United States of America
    Wind turbines on the edge of the Wadden Sea, East Frisia, Lower Saxony, Germany — Stock Photo
    Wind turbines on the edge of the Wadden Sea, East Frisia, Lower Saxony, Germany
    Engineers at truck at sunny wind turbine power plant — Stock Photo
    Engineers at truck at sunny wind turbine power plant
    Two large metal windmills in a soybean field with blue sky and clouds, West of Port Colborne; Ontario, Canada — Stock Photo
    Two large metal windmills in a soybean field with blue sky and clouds, West of Port Colborne; Ontario, Canada
    Engineers with clipboard examining solar panel at sunny power plant — Stock Photo
    Engineers with clipboard examining solar panel at sunny power plant
    Wind power turbines — Stock Photo
    Wind power turbines
    Solar panels of Wuxi City in China — Stock Photo
    Solar panels of Wuxi City in China
    Teesside Refinery, England — Stock Photo
    Teesside Refinery, England
    Wind power turbines — Stock Photo
    Wind power turbines
    Solar panels of Wuxi City in China — Stock Photo
    Solar panels of Wuxi City in China
    A cute Cockapoo dog sitting in a poppy field in the foreground with the Whitburn Windmill in the background; Whitburn, Tyne and Wear, England — Stock Photo
    A cute Cockapoo dog sitting in a poppy field in the foreground with the Whitburn Windmill in the background; Whitburn, Tyne and Wear, England
    Engineers reviewing blueprints at truck at sunny wind turbine power plant — Stock Photo
    Engineers reviewing blueprints at truck at sunny wind turbine power plant
    Engineers reviewing blueprints near wind turbine farm — Stock Photo
    Engineers reviewing blueprints near wind turbine farm
    Wind turbine at wind farm at Jeffreys Bay, Western Cape, South Africa. — Stock Photo
    Wind turbine at wind farm at Jeffreys Bay, Western Cape, South Africa.
    Wind turbines at Jeffreys Bay — Stock Photo
    Wind turbines at Jeffreys Bay
    Engineer and workers using digital tablet at wind turbine power plant — Stock Photo
    Engineer and workers using digital tablet at wind turbine power plant
    White electric vehicle in charge — Stock Photo
    White electric vehicle in charge
    Potato field and wind turbines; Prince Edward Island, Canada — Stock Photo
    Potato field and wind turbines; Prince Edward Island, Canada
    Solar panels against sky — Stock Photo
    Solar panels against sky
    Aerial view of alpine dam and reservoir lake Kolnbreinsperre, Malta valley, Carinthia, Austria — Stock Photo
    Aerial view of alpine dam and reservoir lake Kolnbreinsperre, Malta valley, Carinthia, Austria
    Wind power turbines — Stock Photo
    Wind power turbines
    Large wind turbines on farm fiels with a lake in the background and blue sky with clouds, West of Port Colborne; Ontario, Canada — Stock Photo
    Large wind turbines on farm fiels with a lake in the background and blue sky with clouds, West of Port Colborne; Ontario, Canada
    Portrait smiling engineer on dirt road at wind turbine power plant — Stock Photo
    Portrait smiling engineer on dirt road at wind turbine power plant
    Rainbow Over Windmills, Imperial County, California, United States — Stock Photo
    Rainbow Over Windmills, Imperial County, California, United States
    Engineers installing solar panels at sunny power plant — Stock Photo
    Engineers installing solar panels at sunny power plant
    Large metal windmill in a farm field with blue sky and clouds, West of Port Colborne, Ontario, Canada — Stock Photo
    Large metal windmill in a farm field with blue sky and clouds, West of Port Colborne, Ontario, Canada
    Engineers reviewing blueprints on truck at sunny wind turbine power plant — Stock Photo
    Engineers reviewing blueprints on truck at sunny wind turbine power plant
    Hover Dam Complex on Colorado River, Nevada, USA — Stock Photo
    Hover Dam Complex on Colorado River, Nevada, USA
    Close up of solar panels outdoors — Stock Photo
    Close up of solar panels outdoors
    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
    Portrait smiling, confident female engineer with walkie-talkie at sunny solar power plant — Stock Photo
    Portrait smiling, confident female engineer with walkie-talkie at sunny solar power plant
    Wind turbine energy generators on wind farm — Stock Photo
    Wind turbine energy generators on wind farm
    Engineers on dirt road at wind turbine power plant — Stock Photo
    Engineers on dirt road at wind turbine power plant