Overview
This lecture explains the main fossil fuels used for energy, outlines their advantages and disadvantages, and previews upcoming content on renewable sources.
Main Fossil Fuels Used for Energy
- The three main fossil fuels are coal, oil, and gas.
- Fossil fuels supply around 80% of the world's total energy needs.
Advantages of Fossil Fuels
- Fossil fuels are reliable, providing energy whenever needed.
- They release a great deal of energy, making them suitable for demanding uses like airplanes.
- Fossil fuels are abundant, so they are relatively cheap.
- They are versatile and portable, used for transport, electricity generation, and heating.
Disadvantages of Fossil Fuels
- Burning fossil fuels releases a large amount of carbon dioxide, contributing to climate change.
- Fossil fuels are non-renewable and will eventually run out as they are not replenished.
- Burning fossil fuels can emit pollutants like carbon particles, nitrogen oxides, and sulfur dioxide, which are harmful to health and the environment.
- Sulfur dioxide from burning coal leads to acid rain, damaging buildings and trees.
Key Terms & Definitions
- Fossil fuels — Energy sources formed from ancient organic matter, including coal, oil, and gas.
- Reliable — Consistently provides energy when needed.
- Non-renewable — Cannot be replaced within a human timescale once used.
- Versatile — Usable for multiple purposes, such as transport, electricity, and heating.
- Pollutants — Harmful substances released into the environment.
Action Items / Next Steps
- Review and state the main fossil fuels and their uses.
- List the advantages and disadvantages of fossil fuels.
- Prepare for questions on fossil fuels in the revision workbook.
- Watch the next video on renewable energy sources.