Summary
Energy resources are categorized into renewable and non-renewable sources, each with distinct characteristics and implications for sustainability. Understanding these differences is crucial for evaluating energy strategies.
- Renewable energy — Energy from sources that can be replenished naturally on a human timescale. Example: Solar energy uses sunlight to generate electricity.
- Non-renewable energy — Energy from finite sources that will eventually run out. Example: Coal is a fossil fuel that is burned to produce electricity.
- Energy security — Reliable access to affordable energy supplies. Example: Countries aim to diversify energy sources to ensure energy security.
- Carbon footprint — Total greenhouse gas emissions caused by an activity or product. Example: Driving a gasoline car increases your carbon footprint.
Exam Tips
Key Definitions to Remember
- Renewable energy
- Non-renewable energy
- Energy security
- Carbon footprint
Common Confusions
- Confusing renewable with non-renewable energy sources
- Misunderstanding the sustainability of fuelwood
Typical Exam Questions
- What are two advantages and two disadvantages of hydroelectric power? HEP is renewable and provides reliable power but can displace communities and requires specific locations.
- How is fuelwood used as a renewable or non-renewable resource? Fuelwood is renewable if harvested sustainably but non-renewable if overharvested.
- Why is natural gas considered a transition fuel? It produces fewer emissions than coal and supports renewable integration but is still non-renewable.
What Examiners Usually Test
- Differences between renewable and non-renewable energy
- Advantages and disadvantages of different energy sources
- The impact of energy use on the environment