CHAPTER 6 - CHAPTER 6 THE HUMAN POPULATION I. The...

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Unformatted text preview: CHAPTER 6 THE HUMAN POPULATION I. The Population Explosion A. Current world population: 6 billion people (October 1999) B. Putting the numbers in perspective: 1. Each time your heart beats, 3 more people are added to the world 2. Each time a person dies, 2.8 babies are born C. Causes of population growth: a. Better recruitment resulted from declining infant mortality rates b. Mortality rates decline: Improvement in agriculture increased production and better food distribution and storage Public health measures improved sanitation practices, clean drinking water, mass inoculations Fig. 6.1 For most of human history, population grew slowly, but in modern times it has suddenly "exploded." Fig. 6.2 Declining fertility rates in the last three decades have resulted in a decreasing rate of growth. However, absolute numbers are still adding 80 million per year. II. Different Worlds A. Rich Nations 1. Decreased birth rates 2. Low to negative growth rates 3. Increased consumption rates per person 4. Negative environmental impact due not to numbers but affluence....
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This note was uploaded on 10/17/2011 for the course ENVIRONMEN 201 taught by Professor Staff during the Spring '10 term at North South University.

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CHAPTER 6 - CHAPTER 6 THE HUMAN POPULATION I. The...

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