Cancer can be prevented by avoiding too much sunlight exposure.
Cancer . Many cancers can be prevented by not smoking , maintaining a healthy weight , not drinking too much alcohol , eating plenty of vegetables , fruits and whole grains , vaccination against certain infectious diseases , not eating too much processed and red meat , and avoiding too much sunlight exposure . Cancer prevention . Greater than 30 % of cancer deaths could be prevented by avoiding risk factors including : tobacco , overweight / obesity , an insufficient diet , physical inactivity , alcohol , sexually transmitted infections , and air pollution .