Factors affecting birth rates and death rates

Population growth

Projected world population and growth rate from 1950-2050Projected world population and growth rate from 1950-2050

The population of the world was relatively low and steady until the 1950s when there was a population ‘explosion’. Since then, there has been a rapid increase in the world’s population so that in 2011 it passed 7 billion. The majority of this population growth is again in the developing world.

Is the population getting worse?

The reasons for this rapid expansion is mainly the decrease in global death rates while birth rates remained very high. This meant that many more people were being born than were dying so the population grew.

This difference between birth rates and death rates is called the natural increase.

The video below explains how and why population size can decrease.

Why are family sizes changing?