New guidelines issued by the United Nations agency on Wednesday say that children younger than one year old should not be exposed to any electronic screens, while those in the two-to-four-year age range should have no more than one hour of "sedentary" screen time per day. The announcement stems from research on the developmental effects computers and mobile devices have on children. The WHO also advised against infants and young children remaining sedentary for too long, though some researchers remain unconvinced the WHO's guidelines are necessary. "The restricted screen time limits suggested by the WHO do not seem proportionate to the potential harm," Max Davie from the The Royal College of Paediatrics and Child Health in the United Kingdom told BBC.

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