Email from Childrens Health Defense Wi-Fi routers, tablets, and cell towers are part of daily school life — here's what parents should know. ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ Dear John, Backpack, lunchbox, laptop — for most kids, the school day is centered ar…
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