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人类居住在地球上,共同拥有一个地球,而且只有这样一个地球。时至今日,环境污染日益加剧,生态破坏日趋严重:土地荒漠化速度加快;南极上空的臭氧已减少40%,过量的紫外线损害人的免疫系统;高科技垃圾肆虐太空,危及人类安全……地球母亲已不堪忍受啦。电磁波泛滥突发事故难防范随着社会的发展,人们已进入电子时代。近几年,移动电话急剧增多。这种通信手段需要在
Humans live on the earth and they share one earth, and there is only such an earth. Nowadays, environmental pollution is increasing and ecological destruction is becoming increasingly serious. Land desertification is accelerating. Ozone over the Antarctic has been reduced by 40%. Excessive ultraviolet radiation damages the human immune system. High-tech trash ravages space and threatens human security. It’s unbearable. It is difficult to prevent electromagnetic wave flood accidents. With the development of society, people have entered the electronic age. In recent years, the number of mobile phones has increased dramatically. This means of communication needs to be