The world population has grown from 0.6 billion in 1700 to over 6 billion in 2000 and is projected to reach 9.1 billion by 2050. Population growth rates are much higher in developing countries, over 1.5% per year, compared to more developed regions growing at 0.1% annually. The high population growth raises concerns about sustainability, as a larger population will increase demand for food, water, and other resources while contributing to issues like pollution, deforestation, and depletion of natural resources if left unchecked.

3. YEAR POPULATION (IN BILLIONS)
1700 0.6
1850 1
1930 2
1960 3
1987 5
2000 6.1
2050 9.1

4. • Population growth is determined mainly by
birth rate , death rate and migration patterns.
• For instance the population in the developed
countries like Europe and America is growing
at rate of only 0.1% per year while in
developing countries the growth rate is over
1.5% per year.

6. Largest countries (Projected for 2050)
Country Population (In Millions)
India 1628
China 1369
United States 404
Indonesia 312
Nigeria 304
Pakistan 285
Brazil 244
Bangladesh 211
Ethiopia 188
Congo 182

7. • Population density is population divided by total land
area or water volume
• For humans- population density is the number of people
per unit of area, usually quoted per square kilometer or
square mile
POPULATION DENSITY

8. IMPACTS OF POPULATION GROWTH
It is now estimated that the world population will be around 9.1 billion by the
year 2050. The very high population growth has raised concerns that the
planet may not be able to sustain such population in the long run.
Increasing population will mean increased demand for food, water, and other
resources such as fossil fuel. The impact of population growth can be seen
by everyone who care for the world that we live in. Over the last few
decades there has been large scale destruction of the tropical forests
mainly to make land available for agriculture and for urbanization. In order
to produce enough food to meet the demand of growing population,
forests have been cleared to undertake farming. Due to increased
industrialization and urbanization, there has been great increase in the
pollution of air, water and the environment of the planet. Growing
population will result in the depletion of natural resources such as water,
fossil fuels (Hubert, 1982); deforestation and loss of ecosystems; and
emergence of new diseases. It will also lead to more starvation, hunger
and unhygienic living conditions in poor countries.