Breathing Earth There are at least 3 more people in the world now than there were when you began reading this sentence.

Prof. Hans Rosling is well known to geographers for his work on global development and population change. World population change Watch this video carefully and listen to what is being said about:video 1.How population has changed in different countries and globally 2.How it might change in the future 3.The factors that have and will contribute to population change

Learning Objectives Understand how the world’s population has changed over time Describe how population change has varied between continents Explain what factors have influenced population change

Activity: Write the labels in the correct places to complete the diagram: Births Deaths Immigration Emigration What is population change? Population change is an example of an open system with inputs, processes and outputs. The population of an area is affected by natural change (birth and death) and migration. Total Population Inputs Outputs

How has the world’s population changed over a long period of time?

World population growth Key observations?

World population growth The pattern of the world’s population shows exponential growth: growth continuously doubles, e.g. 1:2:4:8:16

Activity: How has the population growth rate changed over time? Complete the worksheet

The growth in world population has not been evenly spread. The populations of some regions have grown and continue to grow at faster rates than others. Activity: Patterns in global population growth Using the resources provided answer the following questions. Use specific regions and figures in your answers. 1.Describe the pattern of population growth since the 1950s. 2.How is the world’s population predicted to change by 2050.

By 2050 it is estimated that the world’s population will be 9.07 billion

Global population growth

“It’s not that we have started breeding like rabbits, more that we have stopped dropping like flies”

Why has there been such a dramatic explosion in the world’s population? Causes of population growth Activity: Create a mind map to show your ideas. Use pages to add further notes. Can you link the factors together to show how they are interrelated?

There are a number of reasons which are considered to have played a major role in the growth of the human population. Some of these are: HEALTH IMPROVEMENTS, due to... Advances in medicine E.g. The introduction of penicillin as an antibiotic against many harmful diseases such as syphilis has had a huge global impact.

Health improvements due to... Improved sanitation More people than ever have access to flushing toilets, clean running water and disinfectants – reducing the spread of germs and disease.

Health improvements due to... Improved diets Generally across the world diets have improved. Access to a wider range of fresh food is available to more people. Products such as Actimel and Flora ProActive actually claim to improve health conditions – mean people are living longer.

Health improvements due to... Scientific breakthroughs E.g. Progress in IVF treatment is enabling women all over the world who can’t have children, have children.

Learning Objectives Understand how the world’s population has changed over time Describe how population change has varied between continents Explain what factors have influenced population change