Ключевые слова: air pollution, antiradon, bedrock, building activity, check up, checkup, concept, concepts, construction barrier, construction industry, control, cracked, danger, dangerous, domestic life, examination, examining, gas, graphic, groundwater, house, ideas, indoor, indoors, inhaling, inspection, looking through window, lung cancer, magnifying glass, natural gas, natural ventilation, periodic table, poisonous, pollution, protection, quality control, radiation, radioactive contamination, radioactivity, radon test, radonstop, residential building, respiratory system, risk, safe, screening, security, vent pipe, ventilation, water pollution, window,