Different phone models emit anywhere from 0.2 watts per kilogram of body tissue to 1.6 watts, the legal limit. The amount of radio frequency energy seeping into the body and brain is measured by a unit called the Specific Absorption Rate (SAR).
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“You see all these kids literally glued to their phones,” Gavin Newsom, the mayor of San Francisco, told me. “And candidly, my wife was pregnant and on her cellphone nonstop. So I dusted off some studies and started doing research…
“They said: ‘There you go again. They’re going to mock you. It’s going to be another sideshow,’ ” he recalled. But stroking his baby daughter’s soft head and reading new studies on the vulnerability of children’s thinner skulls to radiation, he persevered.
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