Non-Renewble Fossil Fuels (Cambridge (CIE) IGCSE Geography)

Importance of Non-Renewable Fossil Fuels

• The demand for energy across the globe is rising

• 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

• Over 80% of the world's energy is provided by fossil fuels (coal, oil and gas)

  • 33% oil

  • 27% coal

  • 24% gas

• Fossil fuels are fuels formed from the remains of living organisms (plants/animals)

  • These are non-renewable as they cannot be replaced at a speed which keeps up with consumption

• It is estimated that based on current use and availability, gas and oil will run out by 2080

• The use of nuclear and renewable energy is growing but non-renewable fossil fuels still dominate energy production

• It is predicted that the use of gas and oil will continue to increase over the next 30 years

  • Fossil fuels are expected to still provide over 75% of the world's energy by 2040

Coal

Advantages

• World reserves estimated at 120 years

• Reliable and easy to produce energy from

• Technology has enabled coal to be obtained more easily

Disadvantages

• Non-renewable - it will run out

• Releases carbon dioxide (greenhouse gas) and sulphur dioxide (causes acid rain) when burnt 

• Heavy and bulky to transport 

• Most accessible coal has been used and so the cost of production has increased as coal reserves are more difficult to access

• Risk of accidents due to mine collapse and gas release

• Opencast mining damages large areas of the environment

Oil and gas

Advantages

• Reliable and easy to produce energy from 

• Efficient - it has a high energy density so produces a lot of energy per kilogram

• Not as harmful to the environment as coal (gas is the least harmful)

• Easy to transport via pipeline

Disadvantages

• World reserves estimated to be between 50-60 years

• Non-renewable - they will run out

• The gases released when they are burnt are greenhouse gases

• Oil spills damage the environment and wildlife over large areas

• Prices fluctuate rapidly

• Supplies can be affected by conflict and political disagreements e.g. the war in Ukraine

Energy use

• MEDCs usually use more energy than LEDCs

  • Countries with the highest energy consumption per person tend to be MEDCs and include Canada, Norway and Saudi Arabia

  • Countries with the lowest energy consumption per person are LEDCs which are all in Africa and include Niger, Chad and Tanzania

• The greatest growth in energy use in LEDCs and newly emerging economies such as China and India

• Development means more use of energy in

  • businesses and factories 

  • homes as people buy more appliances and technology

  • transport

Energy security

• 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 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 in many countries

• Energy security can also be affected by:

  • energy sources running out

  • war/conflict

  • natural hazards

  • political disputes

Energy mix

• The energy mix in countries varies depending on the level of development

• The most economically developed countries have a wider use of renewables and nuclear energy

• The newly emerging countries are more dependent on fossil fuels

• The least economically developed countries are dominated by biofuels which is mostly fuel wood used for heating and cooking, particularly in rural areas