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TOPIC 18 How many people are in the world? - Coggle Diagram
TOPIC 18
How many people are in the world?
The world population
The first billion reached it in the 1800s. The second 127 years later, and then every billion additional was presented in more time periods and shorter.
At the beginning of our era, 2020 ago years, it has been estimated that humanity reached approximately 250 million, that is, a quarter of a billion people.
According to calculations of United Nations, in mid-2015 the population of the world was 7.35 billion, that is 7.350 million people.
Now 267 children are born in the world and 107 people die per minute. Of these are 26 births and 23 deaths per minute in developed countries and 241 births and 84 deaths per minute in poor countries.
Continents’ population
They are followed in descending order: Africa (1,113 million), Europe (788 million), North America (572 million), South America (416 million), Central America and the Caribbean (48 million), and Oceania (39 million).
According to United Nations projections, in the year 2100 the most populous country in the world would be India (1.660 million), followed by China (1,000 million), Nigeria (752 million), the United States (450 million) and the Democratic Republic of the Congo (389 million).
The world population is not evenly distributed among the continents. At present the most famous continent the world is the Asian, because there is a number of people (4,366 million) higher than the rest of the world.
Demographic transition
However, from the 18th century, and during the following centuries, the mortality rate was
lowered. More people were born than they died. Because living conditions were improved.
This phenomenon called "demographic transition", began in Europe. Then it spread to the other continents. Thus, between 1800 and today the world population has multiplied by seven sometimes approximately.
A little over two hundred years ago, that is, before the 18th century, population growth in all parts of the world. It was always very slow because high birth ratesthat were invalidated because high mortality rates.
Population disproportions
North America is the most urbanized continent (81%). Africa and Asia are the least urbanized (41%). The other continents have a greater urban population: Latin America (78%); Europe (74%) and Oceania (73%).
In 2007, worldwide, the urban population already exceeded the rural population. But the proportion is different according to the continents.
Birth and mortality
The average number of people born in a specific place and time, and who increase mint the existing population, is called birth. The number of people, who die in a specific place and time, and the existing population decreases, is called mortality.
Population transformations can be explained in large part by two factors that are considered very important: birth levels and mortality levels.