Ключевые слова: alternative, background, battery, building, cartoon, city, concept, eco, ecological, ecology, ecosystem, electric, electrical, electricity, energy, environment, flat, friendly, generator, green, header, illustration, landscape, modern, natural, nature, outdoor, panel, plant, poster, power, powerhouse, recycle, renewable, resources, solar, sun, supply, sustainable, technology, template, town, turbine, typographic, urban, volt, voltage, wind, windmill,