GEO 702 Lecture Notes - Lecture 13: Greater Tokyo Area, Exponential Growth
22 Nov 2017
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Document Summary
The numbers game: first billion population occurs in 1880 ad. This has taken 2 to 5 million years: there are two billion on the planet by 1930. The second billion occurs over 50 years: three billion is achieved by 1960. This has only taken 30 years: four billion people occupy the planet by 1975. If slower rates of growth than at present. 10. 5 billion by the year 2110 if slightly higher growth rates , 14. 2 billion by 2130. Concentration: 1950 two cities in the world have a pop. Over 10 million, new york and london: 1985 eleven cities in the world are over 10 million, 2001 twenty-five cities of 10 million. Mexico city, new york philadelphia area. Exponential growth impact on resources: some growth rates will be limited by the ecosystem ability to go along with the desired rate of growth, for example in 2008 world grain production was 2,226 million tons.
