Thursday, February 16, 2017 Chapter 5: Human Population Growth The Human Population - 2011- hit 7 billion - What factors influenced population over time? • Industrial Revolution- making things easier for us, technology, sanitation, medicine • Agriculture- more food, plants and animals - What factors accoWe also discuss several other topics like recitatif background
We also discuss several other topics like What is the smallest unit of speech?
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Don't forget about the age old question of achromacy
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unt for the differences that currently exist among countries? • wealth - nutrition - healthcare - sanitation - education • age - Death rates • survivorship - numbers of years you’re expected to live • life expectancy - influenced by wealth and sex - US - men 77.7 years, woman 82.1 years - Globally - 45.6 to 68.9 in last 50 years - Age Structure • determined by survivorship and age specific birth rate • creates age structure pyramids - Migration • Immigration- come into 1Thursday, February 16, 2017 • Emigration- leaving • Net migration rate = Immigration - emigration - Why is forecasting important? • Carrying capacity- amount of people supported by a given area - Why is it hard to give a definite number of people when forecasting? • we don’t know what’s going to happen between now and the time forecasted - Can we quantify our impact on resources and ecosystems? • Human resource use - ecological footprint - varies greatly between countries - Human resource use • biocapacity -> area and quality of land to supply resources • exceed = imports - Resource Use and Pop Sustainability • Affluence and tech - IPAT -> I = P x A x T • I = environmental impact • P = population • A = affluence • T = technology - How do we manage population growth? • Family planning - teaching birth control • Education - woman are going to school and waiting to have kids 2Thursday, February 16, 2017 • Resource pressures • Economics 3