Caused by factories, smelters and metal melting Oil refining industry, and air pollutants that caused most of the factories are dust. Carbon smoke, sulphur dioxide Carbon dioxide (CO2)
Caused by the smelter and foundry industries. Oil refining industry, air pollution, etc., caused mainly include industrial dust, soot, sulfur dioxide. Carbon Monoxide
Caused by industries such as smelting plant and casting industry refinery, etc. of air pollution caused by industry mostly Such as dust, soot, smoke, sulfur dioxide, carbon monoxide