Silicosis is due to excess inhalation of silica dust in the workers involved grinding or stone breaking industries. Long exposure can give rise to inflammation leading to fibrosis and thus causing serious lung damage. Anthrax is a serious infectious disease caused by Bacillus anthracis. Emphysema is a chronic disorder in which alveolar walls are damaged due to which respiratory surface is decreased. Botulism is a form of food poisoning caused by Clostridium botulinum.