Is It Normal for a 4 Year Old to Not Talk?
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There's no obvious reason for their language delay. Researchers are looking into the role that genetics may play. Many Late Talkers seem to catch up to their peers by the time they begin school [1]. However, 20-30% of late talking children continue to have problems with language development.
James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.
