Welders work on almost any sort of project that requires the joining of metal parts. This could involve work on construction sites, bridges, ships and pipelines. And the process of welding always produces smoke that contains gas byproducts and metal fumes.
If inhaled, welding fumes can cause very severe health issues. Even short term exposure can cause problems, such as irritation of nose, throat, and eyes as well as dizziness and nausea. Prolonged exposure can result in damage to the kidneys and nervous system. The fumes could also cause larynx, lung and urinary tract cancer.