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Garth Holman

World Population - YouTube - 0 views

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    World Population Crops to modern day.  
Miguel Laborde

Prehistoric Farming on the Colorado Plateau - 1 views

    • Ryan Marks
       
      I found a cave in minecraft
    • Alexander R.
       
      so have I
    • Miguel Laborde
       
      Agriculture revolution
Jason Wu

Population: 7 Billion - 2 views

  • 7 Billion: How Did We Get So Big So Fast? Watch as global population explodes from 300 million to 7 billion.
  • Sometime Monday, the world will have more humans than ever: 7 billion, according to the U.N. Source: U.N. Population Division Credit: NPR Countries Grow Populations, And Face New Problems Oct. 31, 2011 text size A A A October 31, 2011 The U.N. estimates that the world's population will pass the 7 billion mark on Monday. Much of that growth has happened in Asia — in India and China. Those two countries have been among the world's most populous for centuries. But a demographic shift is taking place as the countries have modernized and lowered their fertility rates. Now, the biggest growth is taking place in sub-Saharan A
  • population
    • Jason Wu
       
      How should the population decline?
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    Monday Oct. 31  World Population reaches 7 billion.  In 1820, earth has one billion people.  
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