Ключевые слова: 2, african, agent, american, analyze, arrow, audit, background, banner, black, business, businessman, calculating, calculation, calculator, chart, comparison, copy, desk, document, ecological, efficiency, efficient, energy, environment, estate, high, home, house, improvement, insulation, male, man, mature, panoramic, people, property, rate, rating, real, report, responsible, saving, space, technology, two, using, white, working, young,