According to UN estimates that release in March 11th, 2009 the worlds population was projected to exceed nine billion in 2050, up from 6.8 this year and seven billion early in 2012. The additional 2.3 billion are mostly in the developing world, which was estimated to increase from 5.6 billion this year to 7.9 billion in 2050. During the same period population in the developed nations was estimated to rise from 1.23 billion to 1.28 billion. This estimate figure included the projected net immigration that are coming from developing countries at a rate of 2.4 million persons annually from 2009 to 2050. Within the developing countries population for 49 least developed countries is going to be doubled from 0.84 billion to 1.7 billion, while for the rest of third would its population is increasing from 4.8 billion to 6.2 billion during the same period. It should be noted tht the most probable scenario of future direction of fertility rates are its declines from 2.56 children per women in 20
by F.J. Putuhena