old aged dangerous asbestos roof - concept with placard indicating danger

abatement activity aged aging air amiante asbestos asbestoscement asbestosis building cancer cancerous carcinogen carcinogenicity cement construction corrugated damage danger dangerous dust encapsulation environmental fiber fibers fibrous hazard illness industry inhalation lung material mesothelioma panels particles placard pollution process removal removing risk roof roofing safety sickness signpost substance testing toxic tumor waste