BIOLOGY 1M03 Lecture Notes - Lecture 19: Background Extinction Rate, Ecosystem Diversity, Endangered Species
15 May 2017
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Document Summary
Human demography: the study of the characteristics of human populations, such as size, growth, density, distribution and vital statistics. Global population growth rate maximum occurred around 1970: 2. 1% per year. Absolute annual increase in people peaked in 1990: 86 million people per year. Striking demographic transitions: we are getting old: before 2000, young people outnumbered old people, after 2000 old people outnumber young people, urbanization: before 2010, rural people outnumbered urban people; after 2010 urban outnumber rural. By 2050 ~70% of people will live in urban areas: growth of developing world: in 1950 the lesser developed world had. 2 times the number of people than the developed world; by 2050 there will be 6 times the number of people in the lesser developed world. Worlds least developed regions double in population size between now and 2050, from 828 million to 1. 66 billion. Includes 49 countries, 33 of which are in.
