84 recognize the health risks of enduring further exposure to other more common pollutants such as sulfur dioxide, fly ash, carbon monoxide, coal tar residues, etc. resulting from the combustion of conventional fuel. Regulatory limits for radionuclide concentrations in natural gas have not yet been established. Therefore at present, no nuclear stimulated natural gas is being commercially distributed, nor will it be until such regulations are established. Part G Question 17 Do you have any ideas how this problem should be handled? Part G Answer Question 17 The problem of radionuclides in the atmosphere is being studied extensively in the plowshare program in an effort to determine the extent of the problem and methods of minimizing it. We are confident that the concentrations of radionuclides predicted from the present technology can be greatly reduced by the variety of continuing efforts discussed previously. The Commission is continuing its research and development programs to reduce the amounts of radionuclides in products proposed for recovery by peaceful nuclear ex-~ plosions and to determine the effect on the environment and to individuals of trace amounts of radionuclides in such products.