What is directly linked to lung and oral cancer?

Tobacco use is directly linked to both lung and oral cancer, with smoking being a significant risk factor for the development of these diseases. The carcinogenic substances in tobacco smoke contribute to mutations in cells that can lead to cancer. Additionally, excessive alcohol consumption, particularly in conjunction with tobacco use, increases the risk of oral cancer. Other factors, such as exposure to certain chemicals and poor oral hygiene, can also contribute to the risk of oral cancer.