How dangerous is mobile communication in general and 5G in particular? And what can we do to protect ourselves? The strong mobile radiation in our country is increasingly making more people ill; at least two percent of the German population is now considered electrohypersensitive. But animals and plants are also showing more frequent illnesses and lasting damage. These are not loose assumptions, but hard, study-based facts. The esteemed physicist Prof. Dr. Klaus Buchner informs in his exciting, easily understandable, and well-founded book about the background and dangers of mobile communication, especially the new 5G standard. The former Member of the European Parliament collaborates with environmental physician Dr. Monika Krout to present serious studies and case examples that have hardly been reported on so far. Buchner is not an enemy of technology.