Report on a United Nations Population Fund report saying the world's population will be about 8.9 billion in 2050. This is down from an earlier prediction of 9.4 billion; a third of this gap is due to HIV/Aids which is spreading faster than expected. "In Botswana, where one of every four adults is infected, life expectancy has fallen from 61 years in the late 1980s to 47 today, and is expected to plunge to 38 by 2005-2010. Nevertheless, the population is still expected to nearly double by 2050." "Of the 4.8 bn people in developing countries, nearly three-fifths lack basic sanitation. Almost a third have no access to clean water."