hand writing with a pencil over an old aged dangerous asbestos roof

activity aged aging air amiante asbestos asbestoscement asbestosi asbestosis building buildings cancer cancerous carcinogen carcinogenic carcinogenicity cement concept concepts concrete construction damage danger dangerous dust environmental fiber hand health healthcare human illness industrial industry intoxication lung material materials medicine most old one over pencil poisonous pollution process risk roof roofing rooftop safety sickness substance toxic tumor waste writing