Ключевые слова: 3d, architecture, arrow, bar, building, certificate, chart, chimney, class, classification, concept, construction, consumption, ecology, economy, efficiency, efficient, electricity, energy, energy efficiency, energy saving, environment, glove, graph, hand, holding, home, house, housing, illustration, industry, isolated, label, letter, logo, model, performance, photo, profession, rating, renewable, roof, savings, shape, sustainable, symbol, warming, white, work, worker,