About 53% of all deaths in the u. s. are caused by cardiovascular disease and:

About 53% of all deaths in the u.s are caused by cardiovascular disease and cancer. Approximately 16% of deaths in the U.S are related to genetic factors and approximately 83% of deaths in the U.S before age 65 are preventable. A majority of the risk for lung disease in the united states is contributed by tobacco use. 

A. radioactive dating