Ключевые слова: alternative, architecture, bio, building, businessman, city, clean, concept, conservation, construction, day, earth, eco, ecologic, ecological, ecology, efficiency, electric, electricity, energy, environment, environmental, estate, friendly, future, grass, green, home, house, housing, illustration, leaf, man, natural, nature, organic, plant, pollution, power, property, recycle, recycling, renewable, residential, reuse, saving, sustainable, symbol, technology, tree,