There are several environmental factors that are known to increase the risk of developing cancer. Some of these factors include: Exposure to carcinogenic chemicals such as asbestos, benzene, and formaldehyde, which can be found in workplaces, homes, and other environments. Air pollution, including fine particulate matter and other pollutants that can be inhaled and cause damage to the lungs and other organs. Contaminated water and soil, which can contain harmful chemicals and heavy metals. Lifestyle factors such as smoking, alcohol consumption, and a diet high in processed foods and low in fruits and vegetables. Infections caused by certain viruses and bacteria, such as human papillomavirus (HPV) and Helicobacter pylori (H. pylori), which can increase the risk of developing certain types of cancer. It's important to note that not all exposure to these environmental factors will necessarily lead to cancer.  The dose of exposure to a harmful substance, as well as genetics, also play a role in an individual's risk of developing cancer. However, taking steps to reduce exposure to known carcinogens and adopting a healthy lifestyle can help reduce the risk of developing cancer.