This statement concerned the efforts of NIOSH to protect workers against the hazardous effects of radiation exposure, particularly radiation induced carcinogenesis. Data were gathered concerning hazards from radon daughter products among uranium mining and milling operations including the increased incidence of lung cancer. Technical assistance has been provided by NIOSH in addressing problems from radiation generating equipment. Exposures of airport personnel working with baggage x-ray inspection units were deemed to be well below the OSHA exposure standard and the radiation hazard to these workers was classified as minimal. An epidemiologic study was initiated of workers on nuclear propulsion ships and other workers at the Portsmouth Naval Shipyard. In the area of nonionizing radiation NIOSH has undertaken efforts to study radiofrequency and microwave, ultraviolet, infrared, laser, optical, noise and ultrasonic radiation. Workers were potentially exposed to radiofrequency and microwave radiation from a large number of devices including radio and radar transmitters, industrial dryers, heat sealing and curing equipment and certain medical research devices. Hazards from exposure to ultraviolet radiation included eye and skin damage, hyperpigmentation and skin cancers. Infrared radiation has been associated with development of cataracts and other eye damage. Those subject to optical radiation included welders and keyboard operators using video display terminals. Short term training sessions were offered by NIOSH to assist workers in understanding the hazards associated with various types of radiation to which they may be exposed at the work place.