Exploring Global Geographical Issues
Exploring Global Geographical Issues
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Exploring Global Geographical Issues
Lesson Objective
At the end of the lesson you will understand tectonic and climate hazards, development, and urbanisation, including real-world examples and case studies.
What is a Global Geographical Issue?
A global geographical issue is a problem or challenge that affects people, places, and environments across the world, often requiring international action to manage or solve.
Examples:
Natural hazards (earthquakes, volcanoes, climate change)
Development gaps (differences in wealth and quality of life between countries)
Urban challenges (overcrowding, pollution, housing shortages in cities)
The Hazardous Earth: Tectonic Hazards
Tectonic hazards, such as earthquakes and volcanoes, are caused by the movement of the Earth’s crust. The Earth’s crust is divided into tectonic plates that move due to convection currents in the mantle. When these plates collide, separate, or slide past each other at plate boundaries, pressure builds up and can be released suddenly, causing earthquakes or volcanic eruptions.
Quick facts to memorise:
Constructive boundary → plates move apart → magma rises → volcanoes
Destructive boundary → plates collide → subduction → strong earthquakes + volcanoes
Conservative boundary → plates slide past → friction → earthquakes only
Types of Plate Boundaries
Destructive: Plates move together, one sinks. Causes violent eruptions, big quakes. Conservative: Plates slide past, causing earthquakes only.
Destructive & Conservative
Plates move apart. New crust forms. Causes gentle volcanoes, minor earthquakes.
Constructive
Primary vs Secondary Effects
Primary effects are the immediate impacts of a hazard, caused directly by the event, such as deaths, injuries, and collapsed buildings.
Secondary effects are the indirect impacts that happen after the event, as a result of the primary effects, such as fires, disease outbreaks, homelessness, and disruption to transport or supplies.
Easy way to remember:
Primary = direct + immediate
Secondary = indirect + later
Responses: Immediate and Long-term
Immediate responses are actions taken straight after a hazard to protect people and reduce suffering, such as search and rescue, emergency shelter, food and water supplies, and medical aid.
Long-term responses are actions taken over time to recover and reduce future risk, such as rebuilding homes and infrastructure, improving building design, strengthening emergency planning, and educating people about hazard preparedness.
Easy memory line:
Immediate = save lives
Long-term = rebuild and prepare
Case Study: Nepal Earthquake 2015
The Nepal earthquake was a 7.8 magnitude earthquake caused by movement at a destructive plate boundary where the Indian Plate collided with the Eurasian Plate. Primary effects included over 8,000 deaths, thousands of injuries, and widespread building collapse. Secondary effects included landslides, avalanches, homelessness, and loss of tourism income. Responses included search and rescue teams, international aid, and long-term rebuilding with safer buildings.
Case Study: Nepal Earthquake 2015
Primary effects
Over 8,000 people died
More than 20,000 injured
Buildings, schools, and hospitals collapsed
Roads and communication systems damaged
Power and water supplies disrupted
Secondary effects
Landslides blocked roads and rivers
Avalanches on Mount Everest killed climbers
Many people left homeless
Tourism income fell
Risk of disease due to poor sanitation
Responses
Immediate responses
Search and rescue teams
International aid (food, water, tents, medical help)
Helicopters rescued stranded people
Long-term responses
Rebuilding homes and infrastructure
Stricter earthquake-resistant building designs
Improved disaster planning and preparedness
Case Study: Eyjafjallajökull Eruption
The Eyjafjallajökull eruption happened in Iceland in 2010. Major primary effects included a large ash cloud, damage to farmland, and over 100,000 flights cancelled across Europe. Secondary effects included major economic losses, disruption to global travel, and reduced tourism. Responses included evacuating local residents, grounding flights for safety, and improving volcanic monitoring and emergency planning.
Case Study: Eyjafjallajökull Eruption
Immediate responses
Evacuations near the volcano
Roads closed
Flights grounded across Europe for safety
Long-term responses
Better volcanic monitoring
Improved ash cloud forecasting
Emergency planning updated for aviation
Responses
Effects
Primary effects
Ash cloud spread across Europe
Over 100,000 flights cancelled
Thousands of people stranded
Local farms damaged by ash
Roads closed and water contaminated
Secondary effects
Huge economic losses (billions of pounds globally)
Tourism in Iceland affected
Air travel disruption worldwide
Some farmers lost livestock
Climate Change: What is Happening?
Climate change is causing the Earth to warm due to increased greenhouse gases in the atmosphere. This leads to rising sea levels, more extreme weather events, and changes to ecosystems. Both people and the environment are affected worldwide through flooding, food shortages, and loss of biodiversity.
Quick facts to remember:
Sea levels rise → coastal flooding
Extreme weather increases → heatwaves, storms, droughts
Ecosystems affected → habitats lost, species endangered
Humans affected → food/water shortages, health risks, displacement
Easy memory line:
Warmer Earth → higher seas → harsher weather → global impacts
Evidence and Causes of Climate Change
Natural: Volcanic eruptions, sun cycles. Human: Burning fossil fuels, deforestation.
Natural or Human Causes?
Evidence
Temperature records, shrinking glaciers, rising sea levels.
Impacts of Climate Change
Climate change causes rising sea levels, which threaten coastal areas through increased flooding and erosion. It also leads to more extreme weather events such as storms, droughts, and heatwaves. Changes in habitats put animal and plant species at risk, leading to loss of biodiversity and disruption to ecosystems.
Easy memory points:
Rising seas → flooding & coastal erosion
Extreme weather → storms, droughts, heatwaves
Habitat changes → animals and plants at risk
Loss of biodiversity → ecosystems damaged
Mitigation vs Adaptation
Mitigation involves actions that aim to reduce or stop climate change by lowering greenhouse gas emissions. Examples include using renewable energy sources and carbon capture technology.
Adaptation involves actions that help people cope with the effects of climate change. Examples include building flood barriers, improving sea defences, and using drought-resistant crops.
Quick memory tip:
Mitigation = cause (reduce the problem)
Adaptation = effect (deal with the problem)
Development Dynamics: Indicators
Key Indicators
What do they show?
These indicators show how developed a country is by measuring its economic wealth, health, and level of education. Together, they help compare quality of life between different countries.
Quick version to memorise:
Development level
Quality of life
Comparison between countries
Key indicators of development include GDP, life expectancy, literacy rate, and HDI.
GDP (Gross Domestic Product) measures the total value of goods and services produced in a country, showing economic wealth.
Life expectancy shows the average age people are expected to live, indicating health and healthcare quality.
Literacy rate measures the percentage of people who can read and write, showing access to education.
HDI (Human Development Index) combines income, education, and life expectancy to give an overall measure of development.
Uneven Development: Why?
Countries do not develop equally due to a range of factors:
Physical factors: Climate, natural hazards, and disease can limit development and make farming or infrastructure more difficult.
Historical factors: Colonialism has left some countries with weaker economies and reliance on exporting raw materials.
Economic factors: Countries with better access to trade, investment, and resources tend to develop faster.
Political factors: Stable governments support development, while corruption, conflict, or weak governance can slow progress.
Quick memory tip:
PHEP = Physical, Historical, Economic, Political
Case Study: India's Development
India is an emerging economy with rapid economic growth, particularly in technology and industry, creating more job opportunities. However, it still faces challenges such as poverty, air pollution, and inequality between rich and poor. Despite this, the quality of life for many people is improving due to rising incomes and better access to services like education and healthcare.
Quick memory points:
Growth: tech + industry jobs
Problems: poverty, pollution, inequality
Outcome: improving quality of life (but uneven)
Urbanisation and Megacities
Urbanisation is the process where an increasing proportion of people live in cities, causing them to grow. Megacities are cities with over 10 million people, and they create both opportunities and challenges.
Quick expansion (useful for marks):
Opportunities:
More jobs
Better access to healthcare and education
Improved transport and services
Challenges:
Overcrowding
Housing shortages and slums
Traffic congestion and pollution
Memory tip:
Urbanisation = city growth | Megacities = big opportunities + big problems
Causes of Urban Growth
Urbanisation is driven by push and pull factors. Push factors in rural areas include poverty, low wages, and a lack of jobs and services. Pull factors in cities include better job opportunities, improved education, and better healthcare. These factors encourage people to move from rural areas to urban areas.
Quick memory tip:
Push = forced away (bad conditions)
Pull = attracted to (better opportunities)
Opportunities vs Challenges of Megacities
Challenges
Megacities provide more job opportunities, especially in industry and services, along with better access to education, healthcare, transport, and other services, improving quality of life for many people.
Megacities often face overcrowding, leading to traffic congestion and strain on services. There are also housing shortages, which can result in the growth of informal settlements, as well as high levels of pollution.
Opportunities
Case Study: Mumbai
Mumbai faces several major urban challenges due to rapid urbanisation. These include severe housing shortages, which have led to the growth of informal settlements (slums), traffic congestion caused by overcrowded roads, and poor sanitation, which increases the risk of disease. The city also suffers from high levels of air and water pollution, which affects health and quality of life.
To address these issues, several solutions have been introduced. These include better urban planning to manage growth more effectively, the construction of new and affordable housing to reduce overcrowding, and improvements to public transport systems such as rail and bus networks to reduce traffic congestion and pollution.
Summary: Key Points
We have explored how tectonic activity, climate change, and uneven development shape the world. Case studies show their real impacts on people and environments, as well as the responses used to manage them. It is important to remember the links between causes, effects, and responses when explaining global geographical issues.
Quick final exam reminder:
If you see an 8-mark question, always structure it as:
Cause → Effects → Responses (with case study detail)
You’ve got this!!
In the exam you do not need perfect answers just clear ones A solid case study a few correct facts and a structured explanation can pick up a lot of marks quickly!
Stay calm trust what you have revised and answer one question at a time :)
