NITA BHALLA ONE in three schoolchildren across the world have been unable to access remote learning during coronavirus school closures, the U.N. children's agency said on Thursday, warning of a "global education emergency". Nearly 1.5 billion children were affected by school closures as countries locked down to prevent the disease from spreading, UNICEF said in a report. Yet at least one in three students have had no way of continuing their education at home. "For at least 463 million children whose schools closed due to COVID-19, there was no such a thing as remote learning," said UNICEF's Executive Director Henrietta…