Weld smoke is generated during the welding process due to the combination of high heat and the materials being welded, along with the welding consumables such as electrodes, fluxes, and filler metals. The smoke consists of fine particles of metal, oxides, and other hazardous compounds that can be harmful when inhaled. Depending on the materials being welded, weld smoke can contain a variety of toxins, including manganese, nickel, lead, and chromium. Each of these elements has specific health risks associated with exposure.