Ключевые слова: alternative, architecture, background, bio, building, clean, concept, conceptual, construction, day, design, development, earth, eco, ecological, ecology, efficiency, efficient, electric, electricity, energy, environment, environmental, friendly, grass, green, home, house, housing, leaf, natural, nature, organic, plant, pollution, power, recycling, renewable, residential, reusing, sign, solar, spring, sun, sustainable, symbol, technology, tree,