Ключевые слова: abstract, background, bio, biology, building, car, cloud, conservation, creative, design, draw, drawing, earth, eco, ecologic, ecological, ecology, education, energy, environment, environmental, family, friendly, future, globe, go, graphic, green, happy, home, house, idea, key, natural, nature, planet, power, protection, recycle, reduce, responsibility, reuse, save, sketch, sun, think, tree, wind, world,