External environmental causes of cancer are factors in the environment such as pollutants that increase risk for cancer.
Air pollution
Solid fuels used for cooking and heating
Second-hand smoke
Industrial Chemicals
UV radiation.
Some proven causes of mesothelioma cancer are smoking and drinking. You can read more at malignantperitonealmesothelioma.net/causes-of-mesothelioma
smoking
smoking/lungcancer
There are some causes of cancer that you have no control over, such as genetics. There are causes which you can control such as smoking, drinking, and diet.
Cancer has many different probable causes. A few things that can contribute to cancer forming are lifestyle, genetics, environment, diet, tobacco use, physical activity, radiation, chemicals and some types of infections.
Cancers are not well understood yet. Almost all cancers form from some combination of genetic and environmental causes. Diet may influence the cancer process, since most food now has hormone and chemical additives. Infectious would be the least likely cause, though if proven, might make cancer easier to treat.
I don't know but WARNING do NOT smoke it can give you cancer
shortness of breath lung cancer heart cancer throat cancer mouth cancer bad teeth
Some of the causes of breast cancer include genetic factors, hormonal imbalances, lifestyle choices such as smoking and alcohol consumption, and exposure to radiation or certain chemicals.
Our current understanding of the causes of cancer is incomplete, but it is clear that cancer is not caused by an injury, such as a bump or bruise. And although being infected with certain viruses may increase the risk of some types of cancer, cancer is not contagious; no one can "catch" cancer from another person.
Cancer has many different causes, and the cause of any specific cancer may never be known. There are carcinogenic chemicals such as benzene or formaldehyde, there are carcinogenic viruses, there are genetic defects which predispose some people to getting cancer, there are irritants such as asbestos fibers which are also carcinogenic; radiation can cause cancer.
There is for at least one form of cancer. Human papilloma virus (hpv) is sexually transmitted, and can cause some forms of cancer.