Which one of the following is an enviroment related disorder with the correct main cause?
(a) Black lung disease (pneumoconiosis) found mainly in workers in stone quarries and crushers.
(b) Blue baby disease (methaemoglobinaemia) due to heavy use of nitrogenous fertilizers in the area.
(c) Skin cancer mainly in people exposed to benzene and methane.
(b): Blue baby syndrome is a pathological condition, called methemoglobinemia, in which blood's capacity for oxygen transport is reduced, resulting in bluish skun discoloration in infants. Blue baby syndrome begins when large amounts of nitrates in water are ingested by an infant and converted to nitrite by the digestive system. The nitrite then reacts with oxyhaemoglobin (the oxygen-carrying blood protein) to form metheglobin, which cannot carry oxygen.
Pneumoconiosis is a man-made, occupational lung diseases that are contracted by prolonged breathing of coal mine dust i.e caused by theinhalation of dust, characterized by formation of nodular fibrotic changes in lungs.
Non-Hodgkin lymphoma (or NHL) is a cancer of lymphoid tissue, a part of the lymphatic system. NHL is a heterogenous disease.
Skin cancer is a malignant tumor that grows in the skin cells. It is commonly caused by exposure to the sun's UV rays.