More than half of the world's two billion children live in poverty and suffer from violent conflicts and Aids, according to an annual report by the United Nations' children's welfare agency Unicef. The report, Childhood under Threat, said a child's right to a healthy and protected upbringing - as promised by the widely adopted 1989's Convention on the Rights of the Child - was under threat, partly because governments had failed to improve human rights and introduce economic reforms. About 29,000 children under five die each day, largely from diseases that could have been prevented. War has taken the lives of 1.8 million children since 1990, and the number of Aids orphans has grown to 15 million worldwide, the report said. 'Too many governments are making informed, deliberate choices that actually hurt childhood,' said Unicef executive director Carol Bellamy. 'As children go, so go nations. It's that simple.'