4.2 Energy Sector
The energy sector plays a central role in modern development, but heavy reliance on non-renewable fossil fuels creates critical socio-scientific issues. Green Technology addresses these issues through cleaner energy supply and greater energy efficiency.
Learning Objectives
- Define socio-scientific issues and identify environmental issues related to human activities.
- Explain three main socio-scientific issues specifically related to the energy sector.
- State the two main aspects emphasised in Green Technology to solve energy-related socio-scientific issues.
- Identify renewable energy sources used to replace fossil fuels.
- Describe energy efficiency practices and individual measures to conserve electricity.
Renewable Energy Alternatives and Energy Efficiency Practices
Replacing fossil fuels with clean energy sources and practising energy conservation reduces greenhouse gas emissions.
Short Explanation
What are socio-scientific issues?
Socio-scientific issues are open problems that are controversial social issues related to science. They emphasise moral and scientific applications in real-world situations and arise mainly as a result of human activities.
Greenhouse gas emissions cause climate change phenomena, leading to droughts, flash floods, an increase in Earth's temperature, thunderstorms and the destruction of biodiversity. Examples of general environmental socio-scientific issues include global warming, deforestation, air pollution, water pollution and indiscriminate waste disposal.
Socio-scientific Issues in the Energy Sector
Depletion of fossil fuels
The continuous and increasing use of non-renewable energy sources such as petroleum, coal and natural gas around the world means fossil fuels will soon be depleted.
Global warming
Burning fossil fuels produces greenhouse gases such as carbon dioxide in large amounts, making global warming increasingly critical.
Extreme climate change
Burning fossil fuels triggers severe climate shifts that cause prolonged droughts and various natural disasters.
Two key aspects of Green Technology
The energy sector is the main sector in Green Technology. It emphasises (1) how energy is produced or supplied, and (2) efficiency in usage and distribution of energy produced.
Renewable Energy Alternatives to Fossil Fuels
| Energy source | Description |
|---|---|
| Wind energy | A clean energy source that can replace fossil fuel in the future. |
| Hydro energy | A renewable energy source widely used worldwide to generate electricity. Example: Kenyir Dam in Terengganu is the largest hydroelectric dam in Peninsular Malaysia, which controls overflowing flood water and generates electricity. |
| Solar energy | A renewable energy source with high potential in Malaysia because the country receives abundant sunlight throughout the year. |
| Geothermal energy | A suitable alternative thermal energy from the earth, though it requires specific and suitable geographical factors. |
Energy Efficiency and Conservation Measures
Maximising renewable energy usage reduces carbon dioxide content in the air, thereby mitigating the greenhouse effect and climate change. Implementation of holistic energy efficiency practices encourages manufacturers to produce energy-efficient appliances.
Consumer energy-saving habits:
- Switching off electrical appliances when they are not in use.
- Setting the air-conditioner temperature at home and the office to 24°C – 25°C.
- Using energy-efficient electrical appliances.
Try to Answer First
Answer in your mind, then press “Check Answer”.
What are socio-scientific issues?
State three socio-scientific issues arising from the energy sector.
What is the recommended temperature range for air conditioners to save electricity according to the textbook?
Common Mistakes
- Confusing general environmental issues with issues specific to the energy sector. Students often write water pollution from sewage when asked about the energy sector instead of focusing on fossil fuel depletion and greenhouse gas emissions from fuel combustion.
- Assuming all renewable energies can be implemented anywhere easily. Geothermal energy requires specific geographical factors, whereas solar energy requires sufficient sunlight throughout the year.
- Neglecting the consumption side of Green Technology. Thinking Green Technology only involves building renewable power plants, forgetting that energy efficiency and consumer habits (like switching off idle appliances) are equally essential.
Concept Misunderstandings
Renewable energy completely stops all climate change immediately.
Maximising renewable energy reduces the rate of carbon dioxide emissions into the air, which gradually mitigates the greenhouse effect and climate change, but it requires continuous and holistic adoption.
Setting an air conditioner to an extremely low temperature (e.g., 16°C) cools a room faster without wasting significant energy.
Setting lower temperatures makes the compressor work much longer and consumes substantially more electricity; the textbook recommends 24°C – 25°C for optimal energy efficiency and comfort.
Summary
- The energy sector is critical to Green Technology.
- The burning and depletion of fossil fuels cause severe socio-scientific issues, including global warming and extreme weather disasters.
- Green Technology tackles these issues through two approaches: supplying clean renewable energy (such as hydro, wind, solar, and geothermal) and promoting energy efficiency through energy-saving consumer habits and efficient appliances.
Short Activity
A. Objective Quiz
1 Which renewable energy source is particularly suitable to be developed in Malaysia due to receiving abundant sunlight all year round?
2 Which two aspects are emphasised in Green Technology to solve socio-scientific issues in the energy sector?
B. Fill in the Blanks
3 To conserve electricity at home and the office, it is recommended to adjust the air-conditioner temperature to .
4 The largest hydroelectric dam in Peninsular Malaysia that controls flood water and generates electricity is the Dam in Terengganu.
C. Drag and Drop: Match the Energy Concept to Its Description
Drag each energy concept to the correct description. On a phone, tap an answer first, then tap a matching box. Tap the Answer Choices area to return a selected item.
C. Match the Energy Concept to Its Description
Write the correct energy concept next to each description.
| Description | Energy Concept |
|---|---|
| 1. Renewable energy source suitable for Malaysia due to abundant sunlight throughout the year. | |
| 2. Alternative thermal energy from the earth that requires suitable geographical factors. | |
| 3. Produces large amounts of carbon dioxide, leading to critical global warming and extreme climate changes. | |
| 4. One of the main renewable energy sources in the world used to generate electricity, such as at Kenyir Dam. |
Answer choices: Solar energy • Geothermal energy • Burning fossil fuels • Hydro energy
