A third of the population is in poverty and the majority of the poor still rely for a living on agriculture, where economic growth has been slower. A lack of infrastructure and access to basic services continues to hinder rural development. As well as the rural poor, there are the problems of Aids and orphans – an estimated 1.6 million Tanzanians have Aids and 1.3 million children have been orphaned as a result of Aids – and malaria which is the highest cause of death among children due to drinking unsafe water.