Coal workers' pneumoconiosis (CWP), commonly known as "black lung disease," occurs when coal dust is inhaled. Over time, continued exposure to the coal dust causes scarring in the lungs, impairing your ability to breathe. Considered an occupational lung disease, it is most common among coal miners.

The original text of the Constitution contained 395 articles in 22 parts and eight schedules. It came into effect on January 26, 1950, the day that India celebrates each year as the Republic Day. The number of articles has since increased to 448 due to 100 amendments.