Human Population Notes
Human Population Notes EVPP111
Popular in Environmental Science 111
Popular in Environmental Science
This 4 page Class Notes was uploaded by Kime Howard on Monday September 21, 2015. The Class Notes belongs to EVPP111 at a university taught by Dr. Kim Largen in Fall 2015. Since its upload, it has received 22 views.
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Date Created: 09/21/15
Human Population Introduction 9215 amp 9415 0 Thomas Malthus 1798 o Economist and philosopher 0 Essay on the Principle of Population the perpetual tendency in the race of man to increase beyond the means of subsidence is one of the general laws of animated nature which we can have no reason to expect will changequot if we tried to do anything about it it would be pointless should man struggle against his expanding population he would quotbe perpetually crushed by the rock of the Greek manquot his critics said 0 although the world s population is growing the rate of growth is slowing despite infant mortality rate has decreased and average life span has increased 0 Julian Simon 0 UMD economist argues Although at the beginning the earth could only support one million people yet now then it supports 55 billion and people are still increasing longevity Garrett Harding 0 Tragedy of the Commons 1968 There are no technological solutions to environmental problems such as population atomic war and environmental corruption 0 Have we done irreparable damage 0 Issue of world population 0 Many points of view 0 Few certainties 0 Related to the impact on the environment importance 0 human problems exacerbated by increase in human population 0 how do we quantify the impact of growing population 0 Humans harvest 125 of global Net Primary Productivity 0 Human land use reduces global NPP 95 0 Fires reduces global NPP 17 0 Human use or otherwise prevent from growing 235 global NPP 0 History 0 Increased over time O O O Rate of increase has increased over time Growing rapidly for centuries Advances in knowledge have improved control over food supply and others This has expanded carrying capacity Explosively over the last 300 years Rate of increase has slowed recently Human population Less time between doubling time 1 AD 130 million 1000 AD 260 million 1650 AD 500 million 2000 AD 6000 million 6 billion 1960 BC 3 billion 1987 BC 5 billion 1999 BC 7 billion believed to be 9 billion by 2050 current trends 0 O 0 000000 human population growth continues rapid although the rate has decreased not uniform some countries stable populations birth rates death rates 0 ex Sweden some countries exploding populations birth rates gt death rates 0 ex many developing countries current population 726 billion natural rate of increase 126 projected change 35 by 2050 crude birth rate births1000 crude death rate births1000 natural rate of increase expressed as births from birth rate deaths from death rate all divided by 10 doubling time 70natura rate of increase ex 0 natural rate of increase 15 doubling time 7015 4667 years US Current population 3216 million Natural rate of increase 05 Projected change 24 by 2050 Human Population contd 91115 Factors that affect growth rate 0 Cultural 0 Religious beliefs 0 Traditions 0 Cultural norms o Attitudes about birth control 0 Infant mortality rates Offset by high TFRs total fertility rate Decreased worldwide Lag time between when people start losing children and when people start to realize that if they have children they might not survive 0 Importance of child labor Big difference in developing vs developed nations 0 Average age at which females get married The lower the average age of marriage the higher the TFR Socioeconomic 0 Also importance of child labor 0 Socioeconomic status of women Low status of women high TFR Employment opportunities TFRs decrease when women s access to paid paid employment increase Education opportunities of women 0 Increase of education in women increase in career opportunities later marriage later 1st child fewer children lower TFR Secondary ed TFR 31 0 Primary ed TFR 51 o No formal ed TFR 59 o o 0 Political 0 Family planning policies
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