Population in big cities

A United Nations report on world population trends has provided some interesting information for thought on the future demographics of our planet. The world’s population is currently 6.5 billion and is set (1) ________ and level off to about 9 billion people. The report says population explosions will occur in Africa and Asia, but not in the (2) _________ of the world, “Considerable diversity exists in the expected population growth of countries. The population of many countries, (3) __________ in Africa and Asia, will increase greatly in the coming decades.”  (4)___________, population levels in developed countries are expected to fall, because of decreased fertility rates caused by increased contraceptive use. The report also indicates half of the world’s population will be city (5) _________ by 2007. That is a huge jump from the figure of 30% urbanization in 1993. The five most populated cities today are Tokyo (35 million people), Mexico City (19 million), New York (18.5 million), Bombay (18.3 million) and Sao Paulo (18.3 million). In 1950 only Tokyo and New York had populations of more (6) _________ 10 million people. By 2050 there will be 22 cities of that size. The report concludes, “the current population picture is one of dynamic population changes, reflected in new and diverse patterns of childbearing, mortality, migration, urbanization and ageing. The (7) ___________ and consequences of these population trends present opportunities as well as (8) __________for all societies in the twenty-first century.”

The (7) ___________ and consequences of these population trends