在现代化的城市里,众多的电视中继站、广播发射台、雷达站,各种类型的微波装置,鳞次栉比的天线,数十万公里的动力线,是人们获得信息和能源的神经中枢。但是,随之而产生的射频、微波辐射和高压电源“照射”所引起的“电磁雾”却日益增厚,象汪洋大海一样包围着人类。人们越来越关心:作为一种环境因素,“电磁雾”可能对人体产生何种作用?有多大程度的危害需要防护?如果存在电磁污染,应当怎样加以控制? In modern cities, many television relay stations, radio transmitting stations, radar stations, various types of microwave devices, row upon row of antennas, and power lines of hundreds of thousands of kilometers are the nerve centers for people to obtain information and energy. However, the “electromagnetic fog” caused by the “radiation” of radio frequency, microwave radiation and high-voltage power sources has been increasingly thickening, encircling human beings like the sea. People are more and more concerned about: As an environmental factor, what is the possible effect of “electromagnetic fog” on the human body? How much harm needs protection? How to control electromagnetic pollution?