All cancers are caused due to a reason. There are many reasons why cancers occur some are apparent such as smoking, binge drinking or drinking to excess, a bad lifestyle, old age, genetic make-up and there are some that seem to have no apparent cause.
According to certain studies, a sendentary lifestyle, which is caused by too much sitting, can lead to type 2 diabetes, heart disease and certain cancers.
Some drugs have been observed to increase the risk for certain cancers, but to say drugs cause cancer is a stretch since cancers can be caused by many things. HIV is not caused by drugs, but can be spread from person-to-person if IV drug abusers share an infected needle with someone who infected with HIV who used the needle.
Alot of it
The most basic way to think of cancers is to say that they are caused by cells that are mutated somehow. All the cells in the human body are specialized for a certain type of job; for every type of specialized cell that mutates, a cancer can result.
the main diseases caused by pollution are such as lung and skin cancers
Oral Cancer is not caused from an apple.
About two-thirds of liver cancers are most clearly associated with hepatitis B and hepatitis C viral infections and cirrhosis
things like lung cancer and throat cancer
Approximately 80%.
Most cervical cancers are caused by the HPV virus.
Almost all cases of cervical cancer are caused by human papillomavirus.
Ozone depletion has led to it. It is caused by CFC's.