Dust generated from processes of Nitrogen Phosphate Potassium (NPK) fertilizer production. can disperse in the workplace and harm to the workers. Generally. organic and inorganic dust exposure will cause obstruction of respiratory tract and indicated by decreasing of %FEV1/%FVC level. https://www.roneverhart.com/SWW-x-SXSW-Cake-Something-Was-Wrong-2-8x3/