Consistency of reported health effects of air pollution

Three different studies have considered the relation between various mortality rates and air pollution levels. this paper evaluates the consistency of these studies and finds some evidence of a constant proportional effect on both males and females. Two of the studies indicate a relation between air pollution and total mortality rate but differ in the estimate of the effect by a factor of fifteen. The studies generally find little relation between pollution and lung diseases and lung cancer; they disagree on heart disease and total cancer findings