Ключевые слова: air pollution, building activity, city, concept, concepts, construction industry, crack, cracked, damaged, danger, dangerous, deep, domestic life, drawing activity, game, gas, house, natural gas, playful, poisonous, radiation, radioactive contamination, radioactivity, radon test, residential building, risk, safe, schedule, solution, solving, strategy, success, tris, wall building feature, win, winner, winning,