The world’s current population 7,000,000,000 (well, actually about 7.2 billion) - How did we get to this number? http://www.youtube.com/watch?v=VcSX4ytEfcE
A few facts about human population - The estimated total number of humans who have ever lived: 108 billion (108,000,000,000). - Approximately 6.7% of all people who ever lived are living today.
A few facts about human population For every 1,000 females… 1,010 males
A few facts about human population - 30% of the world’s population regularly eats with these:
A few facts about human population - One of every three people is Chinese or Indian. 1.39 billion 1.27 billion
A few facts about human population - Half of the world’s people live in China, India, USA, Indonesia, Brazil, and Pakistan.
A few facts about human population - The most densely populated country is: Singapore For every km 2, there are 7,300 people.
Human population A key factor to studying and understanding human geography is knowing about human population: Demography: - Where is everyone? - Why do some places have more people than others? - Why does the population increase at different rates? - What about overpopulation?
Where is everyone? 90% of the world’s population lives in the northern hemisphere
Population distribution - Clearly, people are not evenly distributed across the Earth. - Population clusters started where food was grown. - Cities developed from these areas. - Only recently have advances in agriculture and transport technologies allowed for the traditional patterns to change.
World population concentrations Four major concentrations: 1. East Asia - China, Japan, Korea, Taiwan 2. South Asia - India, Pakistan, Bangladesh 3. Europe 4. North America
World population concentrations 1. East Asia - China, Japan, Korea, Taiwan - approx. 1.5 billion (22% of the world’s pop.)
World population concentrations 2. South Asia - India, Pakistan, Bangladesh - approx. 1.5 billion
World population concentrations 3. Europe - approx.. 750 million
World population concentrations More than 4 billion of the world’s people are within these three clusters/concentrations. - Referred to as the Eurasian land mass.
World population concentrations 4. North America – USA, Mexico, Canada - approx. 560 mil.
Dynamic population http://www.worldometers.info/world-population/ - The world’s population is growing at a rate of 1.2%/year. - This may seem small, but actually, huge. - rate amounts to 75,000,000 people/year.
Dynamic population The world’s population is growing enormously. - due to shortened doubling time.
Population growth - The percent (%) by which a country’s population grows or decreases. - Many factors affect this: life-style, standards of living, religious views, etc.
Population growth - Natural increase: difference between number of births and number of deaths. - Crude birth rate (CBR) - # of births per year per 1,000 people. - Crude death rate (CDR) - # of deaths per year per 1,000 people.
2. High-growth stage - High birth rate and declining death rate lead to sustained and significant population increase. e.g. Industrial Revolution and advancement in science and improved standard of living. Europeans went all over the globe, made death rates drop in South America, India, and Africa (after some unpleasantness).
3. Moderate-growth stage - Declining birth rate combined with already-low death rate to continuing population growth. e.g. 1900’s in USA – infant and child mortality rates dropped, people use to have many kids because of a chance they might die young and needed farm hands, no more.
4. Low-growth (or stationary) stage - Low birth rate and low death rate lead to a very low rate of growth. e.g. Birth Rates are the lowest in the world where women are most involved in the labor force and educated. Europe and USA
The demographic transition model Stage 5? - Decline in population as death rate overtakes birth rate