Ключевые слова: abstract, alternative, bubble, car, cloud, communication, conservation, draft, earth, ecology, electric car, electricity, energy, environment, environmental, green, hand drawn, home, house, icons, interior, light bulb low, media, plant, plus sign, positive, rain, recycled, recycling, renewable, resources, shape, signs, silhouette, sketch, social, steering wheel, sun, sustainable, technology, tree, water, wheel, wind turbine, windmill, world,