Center for Environmental Health

Factor	Best estimate (%)	Range
Diet	35	10-70
Tobacco	30	25-40
Occupation	7	1-13
Alcohol consumption	3	2-4
Geophysical factors	3	2-4
Infections	3	2-4
Medicines and medical procedures	10?	1-?
Food additives, pollution, and industrial products.	< 4	<2-7

(Adapted from Moeller, Dade W. Environmental Health, 1992, p. 5)

Environmental Factors - In effect a more detailed description of the above chart.