Fiche de révision : World Population and Its Challenges

📋 Plan du Cours

1. Les contrastes de répartition spatiale
2. Les indicateurs démographiques
3. Le lien entre développement et croissance
4. Les défis démographiques
5. Le vieillissement de la population japonaise

📅 Repères chronologiques

1. 1800The world population was 1 billion people.
2. 1900The world population was 1.5 billion people.
3. 1950The world population was 2.5 billion people.
4. 2000The world population was 6.1 billion people.
5. 2026The world population is 8.3 billion people.

📖 1. Les contrastes de répartition spatiale

★ À maîtriser

• The world population is unevenly distributed, with densely populated areas and sparsely populated areas.

• The main densely populated areas listed are : East Asia, including eastern China and Japan, the Indian Area, including India, Bangladesh and Pakistan, the European zone

• The sparsely populated areas listed are : deserts such as the Sahara and Gobi Desert, polar areas such as Antarctica and Alaska, rain forests such as Amazonia, mountain areas such as the Himalayas and Tibet

Compléments

• Population contrasts can be observed both globally and within individual countries.

💡 Astuce mémo

Les foyers denses s’opposent aux espaces faiblement peuplés.

📖 2. Les indicateurs démographiques

🔑 Notions clés & Définitions

• Birth rate : Defined as the number of live births per 1,000 inhabitants per year.
• Infant mortality : The number of infants who do not survive past their first birthday per 1,000 live births per year.
• Life expectancy : The average length of life people can expect at birth.

★ À maîtriser

• Africa has very high population growth, while Europe has an ageing population associated with lower population growth.

Compléments

• Life expectancy varies greatly from country to country and within countries.

📖 3. Le lien entre développement et croissance

★ À maîtriser

• The demographic transition described in the notes proceeds from high birth and death rates, through falling death rates while birth rates remain high, to declining birth rates and eventually low, stable rates.

Compléments

• The notes link very high birth and death rates and a small population to very low development, including a lack of hygiene and a lack of healthcare systems.

• The notes explain declining birth rates by women's improved position in society, their entry into work and reduced time to care for children, as well as the introduction of contraception.

💡 Astuce mémo

Forte mortalité → baisse de la mortalité → baisse de la natalité.

📖 4. Les défis démographiques

★ À maîtriser

• The notes identify these responses to demographic challenges :
  • immigration
  • women's integration into the labour force
  • technological innovation

Compléments

📌 Governments can encourage people to remain in work for as long as possible to address demographic challenges.

• The notes describe Japan as having some of the world's most restrictive immigration laws.

• The notes associate women's integration into the labour force with better careers and more opportunities to work.

• Technological innovation may address demographic challenges through robots that replace human jobs, including nursing care robots in Japan.

📖 5. Le vieillissement de la population japonaise

★ À maîtriser

• The age groups for people aged 65 and over are :

  • 65–74
  • 75–84
  • 85 and over

• In Japan, the number of people aged 65–74 is decreasing, while the number aged 85 and over is increasing.

Compléments

• Japan is an archipelago, and its population is large compared with its territory.

• Different geographical tools can be used to study the same phenomenon.