Respiratory toxicity can occur through several mechanisms: - Inflammation: Many toxins cause inflammation of the airways, leading to conditions like bronchitis and asthma. - Oxidative Stress: Toxins can cause the production of free radicals, damaging lung tissues. - Fibrosis: Some toxins lead to the formation of fibrous tissue in the lungs, impairing their function. - Carcinogenesis: Long-term exposure to certain chemicals can lead to the development of lung cancer.