Ключевые слова: adult, agriculture, alternative energy, blue, caucasian ethnicity, choice, climate, cloud, development, efficiency, electricity, engineer, environment, environmental conservation, environmentalist, equipment, farm, fuel and power generation, generator, grass, green color, growth, human hand, industry, innovation, landscape, meadow, men, nature, one person, outdoors, power line, power supply, propeller, recycling, renewable energy, rural scene, sky, spinning, sustainable lifestyle, sustainable resources, technology, turning, wind, wind power, wind turbine, windmill, women, working,