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Now, if the authors of that appeal are linking a (legitimate) scientific article about negative impact of microwave radar on human health in the context of 5G, this clearly demonstrates that they have no idea what they're talking about.
A typical radar has power measured in thousands of Watts. A microwave ovens are 800-900 Watts. A typical 5G cell is 250 milliWatts. A typical WiFi is 20 milliWatts.