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4.1 Human Population Trends (Current Population trends (Important trends…
4.1 Human Population Trends
the story of Humans
the first modern humans appeared in Africa 200,000 year ago
They left Africa 100,000 years ago
our population remained steady for thousands of years
farming and the agricultural revolution increased our population
between 15-10 thousand years ago
modern technology and medicine increased human population growth
our current growth rate is exponential
Expected human population for 2100
11 billion
Current Population trends
agricultural revolution and industrial revolution sped up human growth
population in 1800 - 1 billion
population 2011- 7 billion
human population currently demonstrates a exponential growth curve
we expect that to change to logistic between 2050 and 2100
from 1960 to 2015 the human population has grown 143%
percent change= change/original x 100
estimated population of Honduras in 2019 - 9.5 million
Important trends in Human Population today
population growth rate has been decreasing since 1965
1965: 2.2% = 66 million Humans born
2015: 1.2%= 88 million humans born
there is a large scale movement from rural areas to urban
53% of all humans live in rural areas
this percent is increasing
Human population growth is unevenly distributed between social classes
98% out of the 88 million humans born in 2015 were born in under developed nations
population projections
estimates of future population numbers vary considerably
projections vary because:
difficulty to calculate and predict all factors regarding birth rates and TFRs
poor estimates in poorer countries
different data sets used around the world
all projections vary widely
General Facts
The most populated countries in the world are:
India and China
the world population growth rate is decreasing
the highest population densities are found along the coast and in mayor river valleys