Role Of Free Radicals In Initiation And Progression Of Cancer Abstract Cancer is known to be the leading cause of death and also an important barrier to increase life expectancy globally. But have we ever wondered why it is so dangerous? Why is it increasing at a skyrocketing speed? And Why has it become so common only in the last 10-15 years? Why was it not there before? Hopefully after reading this write up you will get all your answers.