Introduction: The Uneven World of Globalisation
Welcome to this study guide on Development Gaps and Environmental Quality. While globalisation has brought the world closer together, it hasn't shared its benefits equally. In this chapter, we explore why some countries have become incredibly wealthy while others have been left behind. We will also look at how we measure these "gaps" and why the environment often pays the price for economic growth.
By the end of these notes, you will understand how to use tools like the Human Development Index (HDI) and the Gini Coefficient to map out global inequality.
1. Measuring the Gap: Single vs. Composite Measures
How do we decide if a country is "developed"? Geographers use different "yardsticks" called indicators. These fall into two main categories:
Single Measures
These look at only one specific thing, usually money. For example, GNI per capita (Gross National Income divided by the population) tells us the average income.
The problem: Money doesn't tell the whole story. A country could be rich but have very poor healthcare or low literacy rates.
Composite Measures
These combine several different indicators into one single score. This gives a much "rounder" and more accurate picture of life in a country. The most important one for your exam is the Human Development Index (HDI).
The Human Development Index (HDI)
The HDI is a score between \(0\) and \(1\). The closer a country is to \(1\), the more "developed" it is. It focuses on three key areas:
1. Life Expectancy: A measure of health and healthcare quality.
2. Education: Measured by the average number of years spent in school.
3. Standard of Living: Measured by GNI per capita (adjusted for what money can actually buy in 그 country).
Did you know? Using the HDI, we can categorise countries into three groups based on the Pearson Edexcel specification:
• Developed Countries: Very High Human Development (VHHD).
• Emerging Countries: High and Medium Human Development (HMHD).
• Developing Countries: Low Human Development (LHD).
Key Takeaway: Composite measures like the HDI are better than single measures because they consider quality of life, not just bank balances.
2. Visualising Inequality: The Lorenz Curve and Gini Coefficient
Globalisation has led to widening development-gap extremities. This means the gap between the richest and poorest is growing. To measure this "internal" inequality (the gap within a single country), geographers use two mathematical tools.
The Lorenz Curve
Imagine a graph where the x-axis shows the % of the population and the y-axis shows the % of the country's total wealth.
• If everyone had exactly the same amount of money, you would see a perfect diagonal line (the Line of Perfect Equality).
• In the real world, the line "sags" downwards. This saggy line is the Lorenz Curve. The further the curve is from the diagonal line, the more unequal the country is.
The Gini Coefficient
The Gini Coefficient turns that graph into a single number to make it easy to compare countries. It is a ratio between \(0\) and \(1\) (or sometimes expressed as \(0\) to \(100\)).
• A score of \(0\) means perfect equality (everyone has the same).
• A score of \(1\) means perfect inequality (one single person has all the money).
• Generally, a higher Gini coefficient means more social and economic tension.
Quick Tip: Don't confuse these! The HDI compares different countries to each other. The Gini Coefficient looks at the gap between the rich and poor inside a single country.
3. Disparities in Environmental Quality
As globalisation accelerates, the environment is affected in different ways depending on a country's level of development. This creates a "gap" in environmental quality.
In Emerging Countries (HMHD):
As these countries industrialise (the "Global Shift"), they often experience high levels of air and water pollution. Factories and power plants are built quickly, sometimes with fewer environmental regulations to keep costs low. For example, megacities in emerging economies often struggle with smog and poor waste management.
In Developed Countries (VHHD):
Many developed nations have "outsourced" their pollution. Because they have moved from manufacturing to service-based economies (quaternary and tertiary sectors), their local air quality might improve. However, they still consume the goods made in polluting factories elsewhere.
The Sustainability Problem:
Globalisation encourages a consumer society. This means we buy more, use more energy, and create more waste. This puts massive pressure on the physical environment and challenges the idea of sustainability (meeting our needs today without ruining the world for future generations).
Key Takeaway: Development often comes at an environmental cost. Emerging nations often suffer the most direct pollution, while developed nations enjoy cleaner air but have a larger "global footprint."
4. Trend Lines and Changing Patterns
When you look at trend lines (graphs showing change over time) for global development, you will notice a few patterns:
• The Rise of Asia: The "economic centre of gravity" has shifted towards Asia (especially China and India) due to globalisation.
• Persistent Gaps: While many "Emerging" countries are catching up, many "Developing" countries in Sub-Saharan Africa are still "switched off" from the global network and are falling further behind.
• The "Winners": TNCs (Transnational Corporations) and the new middle class in emerging countries.
• The "Losers": Unskilled workers in developed countries (who lose jobs to automation or outsourcing) and the environment in rapidly industrialising zones.
Summary Checklist
Common Mistake to Avoid: Don't assume that a high GNI (wealth) always means a high HDI. Some oil-rich nations have huge wealth but may lag behind in women's education or healthcare, giving them a lower HDI than you might expect.
Key Terms Review:
• Composite Measure: A measurement made of multiple indicators (e.g., HDI).
• Gini Coefficient: A mathematical value between \(0\) and \(1\) measuring internal inequality.
• Lorenz Curve: A graph showing how wealth is distributed in a population.
• Environmental Quality: The state of the physical environment, including air and water purity.
• Development Gap: The widening difference in levels of development between the world’s richest and poorest countries.
Note: This topic links closely to the "Global Shift" (3.4) and "Tensions and Localism" (3.8/3.9). When writing 12 or 16-mark answers, try to mention how the development gap leads to migration or political tensions!