TSP is mainly a primary pollutant, but some of it is formed as a secondary pollutant. This includes dust, tiny objects of liquid, soot, and other material. Increased incidences of respiratory diseases and gastric cancer have been linked with the increase in particulate levels. Natural resources include volcanoes, desert land and forest fires
Manmade sources include
steel industry, floor mills, and power plants. The agricultural activities also add TSP.
Particulates slowly settle back to earth and can cause coughing, sore throats and other serious breathing problems in people. Particulate matter can also discolor buildings and other structures.