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Edexcel IGCSE Geography 復習筆記 4.3.1 Energy Demand and Production

Category: IGCSE課程, 國際課程, 教材筆記, 福利干貨 Date: 2022年7月22日下午6:45

Global energy demand has rapidly increased.
Population growth and development are the two main causes of the increase in energy demand:
- The?higher demand for food?leads to more?intensive farming?which requires more energy for machines, light and heat
- Increasing?industry?requires energy for heating, lighting and machinery
- There is more?transport?all of which requires energy in the form of petrol, diesel or electricity
- Urbanisation?increases with development increasing domestic appliances, heating, lighting
- Increased wealth?means people buy more appliances and technology which require energy
Countries with the highest energy consumption per person tend to be developed countries and include Canada, Norway and Saudi Arabia
Countries with the lowest energy consumption per person are developing countries which are all in Africa and include Niger, Chad and Tanzania

energy-use-per-person

The main energy sources are?fossil fuels?which supply 84% of the world's primary energy
Renewables are increasing but only make up 11% of the?energy mix
Nuclear energy is 4% of the primary energy

global-energy-use

Global Energy Sources

Study figure 1a below which shows global energy consumption

fbc89893-8c4e-454a-9bc9-415c8c91e855

Energy Use by World Region

Suggest one reason for the increased energy use in Asia. (3)

Identify the command word
The command word is 'Suggest'
The focus of the question is 'increased energy use in Asia'
This is a three mark question looking at only one reason so a detailed explanation of the reason is needed

Answer

- The big increase after 2000 (1) due an increase in global population (1) which means overall there will be a substantial increase in consumption (1).
- The big increase after 2000 (1) due an increase in consumption per head (1) a people become wealthier they generally have more appliances and devices which use more energy (1).
- Asia shows the biggest overall increase (1) this may be caused by the continued growth in manufacturing (1) which uses large amounts of energy in the process (1).

Energy sources are not evenly distributed across the world
Some areas produce very little energy due to a lack of natural resources or they do not have the money to?exploit?the resources
Fossil fuels are the main energy sources
The main producers of fossil fuels for primary energy are:
- USA
- Canada
- Norway
- Russia
- Australia
- Middle East
The world's largest producers are often the largest consumers of energy

An?energy gap?is when a country cannot meet the demand for energy using its own resources
When countries have an energy gap, they have to import energy to meet the demand
Having an energy gap means that a country is not?energy secure
To be energy secure a country needs an:
- Uninterrupted?supply of energy
- Affordable?supply
- Accessible?supply
The UK has a widening energy gap and is not energy secure because:
- Renewable energy is not as efficient and so cannot replace in full energy from fossil fuels
- It is cheaper to import fossil fuels than it is to exploit the resources in the UK
The commitment of many countries to tackling climate change and reducing the use of fossil fuels has increased energy insecurity for many countries
Energy security can also be affected by:
- Energy sources running out
- War/conflict
- Natural hazards
- Political disputes