Korean Air has vowed to help reduce cosmic radiation exposure for its flight crews, to better protect their health. The airlines company's pledge came after a meeting with its union on June 10. The company said it will enable flight crews to have their flights determined according to the amount of cosmic radiation they have been exposed to. Cosmic radiation is high-energy radiation that travel through outer space and bombard the earth. It is found in higher concentration over transpolar routes, with exposure increased with altitude. Six millisieverts a year is a typical radiation dose received by an aircrews flying long-haul polar routes. Recently, a pilot who had been with Korean Air for 32 years and who had developed acute leukemia had cosmic radiation exposure recognized as an occupational hazard. Korean Air plans to introduce a program next year via which its flight crews' flights and schedules will be managed to take this into account. Currently, the company's flight crews are able to check their accumulated radiation exposure every month via the company website. The new program will automatically calculate the crew members' radiation exposure and switch flight schedules accordingly to reduce exposure. Air crew with close to 6 millisieverts of radiation exposure a year will be put on shorter routes.<br/>