NORTHEAST Nigeria's conflict with Islamist insurgencies had killed nearly 350,000 people as of the end of 2020, according to the United Nations Development Programme (UNDP). The toll, given by the U.N. agency in a new study on the war and its impact on livelihoods, is 10 times higher than previous estimates of about 35,000 based only on those killed in fighting in Nigeria since the conflict's start 12 years ago. "The full human cost of the war is much greater," the UNDP said in a report, released with Nigeria's Ministry of Finance. "Already, many more have died from the indirect…