Criteria for a Recommended Standard

<p>This document examines the occupational health risks associated with exposures to respirable coal mine dust over a working lifetime. Such exposures are associated with the development of occupational respiratory diseases including simple coal workers' pneumoconiosis (CWP) progressive massive fibrosis (PMF) and chronic obstructive pulmonary disease (COPD). Epidemiological studies have clearly demonstrated that miners have an elevated risk of developing simple CWP PMF or deficits in lung function when they are exposed to respirable crystalline silica are also at risk of developing silicosis or moxed-dust pneumoconiosis.</p><p>This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact and remains as true to the original work as possible. Therefore you will see the original copyright references library stamps (as most of these works have been housed in our most important libraries around the world) and other notations in the work.</p><p>This work is in the public domain in the United States of America and possibly other nations. Within the United States you may freely copy and distribute this work as no entity (individual or corporate) has a copyright on the body of the work.</p><p>As a reproduction of a historical artifact this work may contain missing or blurred pages poor pictures errant marks etc. Scholars believe and we concur that this work is important enough to be preserved reproduced and made generally available to the public. We appreciate your support of the preservation process and thank you for being an important part of keeping this knowledge alive and relevant.</p>