Cigarette smoking and breathing the polluted air of cities and industry may cause lung cancers, a doctor's conference was recently told.

Dr. Harrlet L. Hardy, Clinical Associate in Preventive Medicine at the Harvard Medical School, made the suggestion at a Graduate School of Public Health symposium. She said, "It is interesting to consider. . . . the data on cigarette smoking males in relationship to lung cancer in combination with working exposures and urban industrial air pollution."

The symposium was conducted to aquaint doctors with health problems in industry. Ninety per cent of all industries in America employ less than 500 workers and most of these have no sort of health protection.

Dr. Ross A. McFarland, Professor of Industrial Hygiene at the Public Health School pointed out that accidents at home and in industry are probably the leading cause of death in persons 45 and under.