1. © 2006 Population Reference Bureau

2. © 2006 Population Reference Bureau The ecological footprint dvd Journey to planet earth

3. © 2006 Population Reference Bureau 1960 World population reached 3 billion Time Magazine January 1960 David Lam, How the world survived the population bomb, University of Michigan Population Studies Center, 2011

4. © 2006 Population Reference Bureau “ The world, especially the developing world, is rapidly running out of food…. In fact, the battle to feed humanity is already lost, in the sense that we will not be able to prevent large-scale famines in the next decade or so.” - Paul Ehrlich, The Population Bomb, 1968

5. © 2006 Population Reference Bureau Tool-making, agriculture, and industrialization each enabled humans to sustain greater populations. Figure 7.5 Technology Innovation

6. © 2006 Population Reference Bureau Norman Borlaug, “Father of the Green Revolution” 1970 Nobel Peace Prize Winner Discovered how to breed wheat that was disease resistant and that would grow in difficult environments.

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18. “Urbanized societies, in which a majority of the people live crowded together in towns and cities, represent a new and fundamental step in man’s [and woman’s] social evolution.” Kingsley Davis

19. © 2006 Population Reference Bureau How Many Millions of People Live in the World’s Largest Megacities?

20. © 2006 Population Reference Bureau Water 625,000 tonnes Fuel 9,500 tonnes Food 2,000 tonnes Daily Inputs U.S. city of 1 million people Daily Outputs Air pollutants 950 tonnes Rubbish 9,500 tonnes Sewage 500,000 tonnes

21. © 2006 Population Reference Bureau

22. The wealth gap The richest 20% of the world’s population consumes 86% of its resources, and has 80 times the income of the poorest 20%. Figure 7.25

23. © 2006 Population Reference Bureau Millions of Discarded Tires in a Dump in Colorado, U.S.

24. © 2006 Population Reference Bureau Discarded Solid Waste Litters Beaches

25. © 2006 Population Reference Bureau Leaking Barrels of Toxic Waste at a Superfund Site in the U.S.

26. © 2006 Population Reference Bureau We will add nearly 6 million people by 2030, an increase of 36 percent from 2000 the equivalent of two cities the size of Chicago