More people than ever?
over 7.5 billion people on planet right now.
increasing by over 73 million per year.
by approx, 200000 per day
9377 per hour
149 per minute
2.5 persecond
90 percent of this population growth takes place in the developing countries of africa, south adn east asis and latin America
population in billion year years elapsed
1 1804 10000+
2 1927 123
3 1960 33
4 1974 14
5 1987 13
6 1999 12
7 2011 12
2018年10月22日星期一
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The last Humangeo class
Ok... it is really sad to say goodbye, but the good thing is we can still meet in the School! I have a Robotic competition this Sunday and ...
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today we saw a lot of population pyramids and learnt about how to decide this is a developing country or a developed country. And I check ...
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Population Ratio Defined as the number of the males per 100 females in the population. Developed countries have more females than males t...
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Total Fertility Rate(TFR) TFR: average number of children born per woman for a population to remain the same, the TFR must be 2.1 higher ...
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