WASHINGTON (AP) — Coal miners will be better protected from poisonous silica dust that has contributed to the premature deaths of thousands of mine workers from a respiratory ailment commonly known as black lung disease, the Labor Department said Tuesday as it issued a new federal rule on miners' safety.

The , announced by Acting Labor Secretary Julie Su, cuts by half the permissible exposure limit for crystalline silica for an eight-hour shift.

¹ú²úÓÕ»ó¸£Àû. All rights reserved.

More Environment Stories

Sign Up to Newsletters

Get the latest from ¹ú²úÓÕ»ó¸£Àû News in your inbox. Select the emails you're interested in below.