Ключевые слова: aging process, architecture, asbestos, cancer, cancerous, carcinogen, carcinogenicity, carconogenic, cement, concrete, construction, covering, curve, danger, dirty, dust, environment, eternit, fiber, gray, house, illness, material, medicine, old, panel, plate, pollution, protection, repetition, risk, roof, roofer, safety, sheet, squiggle, surface level, toxic, toxic substance, toxic waste,