Ключевые слова: aging process, asbestos, backgrounds, cancer, cancerous, carcinogen, carcinogenic, carcinogenicity, cement, concrete, construction, control, danger, dangerous, diagnosis, dirty, disease, dust, environment, fiber, hazard, healt, house building, illness, lung, material, old, panels, pollution, protection, risk, roof, safety, sikness, squiggle, toxic substance, toxic waste,