what is the problem with human population growth
Human overpopulation Human population has been rising continuously since the end of the Black Death, around the year 1350,[8] although the most significant increase has been since the 1950s, mainly due to medical advancements and increases in agricultural productivity. The rate of population growth has been declining since the 1980s, while the absolute total numbers are increasing. Recent rate increases in several countries previously enjoying steady declines are also apparently contributing to continued growth in total numbers. The United Nations has expressed concerns on continued population growth in sub-Saharan Africa.[9] Recent research has demonstrated that those concerns are well grounded.[10][unreliable source?] As of August 13, 2018 the world's human population is estimated to be 7.643Â billion. [11] Or, 7,622,106,064 on May 14, 2018 and the United States Census Bureau calculates 7,472,985,269 for that same date.[12] and over 7 billion by the United Nations.[13][14][15] Most contemporary estimates for the carrying capacity of the Earth under existing conditions are between 4 billion and 16 billion. Depending on which estimate is used, human overpopulation may or may not have already occurred. Nevertheless, the rapid recent increase in human population is causing some concern. The population is expected to reach between 8 and 10.5 billion between the years 2040[16][17] and 2050.[18] In 2017, the United Nations increased the medium variant projections to 9.8 billion for 2050 and 11.2 billion for 2100.[19]