Energy

Welcome to the Energy Challenge!

In this chapter, we are exploring one of the biggest "challenges in the human environment": Energy. Think about your day so far. Did you turn on a light? Use a phone? Eat toast? All of these things require energy. In this unit, we look at why some countries have plenty of power while others struggle, and how we can keep the lights on without damaging the planet.

1. Energy Security and Insecurity

Before we dive into the details, we need to understand two key terms that describe the global energy situation:

Energy Security: This is the "gold standard." It means a country has an uninterrupted availability of energy at an affordable price. If you have energy security, you can power your hospitals, factories, and homes without worrying about the lights going out.

Energy Insecurity: This is the opposite. It happens when a country cannot meet its own energy needs, or the energy is too expensive or unreliable. This can lead to power cuts and high prices.

Global Patterns

The world is divided into areas of surplus (extra energy) and deficit (not enough energy):

Areas of Surplus (Security): Russia and Eastern Europe (lots of natural gas), the Middle East (vast oil reserves), and North America (coal and shale gas).

Areas of Deficit (Insecurity): Western Europe (many countries rely on imports), most of Africa (lacks infrastructure), and parts of SE Asia.

Quick Review: Think of energy like a battery. If your battery is always at \(100\%\), you have security. If it’s always at \(5\%\) and you can’t find a charger, you have insecurity!

2. Why is Global Energy Consumption Rising?

The world is "energy hungry," and our appetite is growing for three main reasons:

1. Economic Development: As countries like China and India grow (New Emerging Economies or NEEs), they build more factories and their citizens buy more cars and appliances. This requires massive amounts of power.

2. Rising Population: More people on Earth means more homes to heat and more food to produce, all of which use energy.

3. Technology: We live in a digital age. From massive data centres that run the internet to the smartphone in your pocket, our modern life is plugged in \(24/7\).

3. Factors Affecting Energy Supply

Why can't every country just produce its own energy? There are several "roadblocks" to supply:

Physical Factors: This is down to luck! Some countries have geology that formed coal, oil, or gas. Others have the right climate for solar power or high mountains for hydroelectric power (HEP).

Cost of Exploitation: Some energy is there, but it is too expensive to get to. For example, oil buried deep under the Arctic Ocean is much harder and more expensive to reach than oil in a desert.

Technology: New technology can unlock energy. "Fracking" (hydraulic fracturing) allows us to get gas out of rocks that were previously "stuck."

Political Factors: War or political tension can stop energy flowing. For example, a country might stop selling gas to another country because of a political argument.

Key Takeaway: Energy supply isn't just about what's in the ground; it's about whether you have the money, the tools, and the friends to get it!

4. The Impacts of Energy Insecurity

When a country doesn't have enough energy, things can go wrong quickly:

Exploration of Environmentally Sensitive Areas: To find more energy, companies might drill in places like the Arctic or tropical rainforests, which can damage fragile ecosystems.

Reduced Industrial Output: Factories cannot run without power. This leads to fewer jobs and a weaker economy.

Potential for Conflict: Countries may go to war or have serious "resource disputes" over who owns oil fields or gas pipelines.

Social Unrest: High energy prices can lead to "fuel poverty," where people cannot afford to heat their homes, leading to protests and strikes.

5. Strategies to Increase Energy Supply

To solve insecurity, we need to find more energy. We use a mix of two types:

Non-renewable Sources (They will run out)

Fossil Fuels: Coal, oil, and natural gas. They are reliable but release \(CO_{2}\), contributing to climate change.

Nuclear Power: This uses uranium. It doesn't produce \(CO_{2}\), but the waste is radioactive and very dangerous if there is an accident.

Renewable Sources (They won't run out)

Biomass: Burning plant or animal waste.

Wind: Turbines turned by the wind.

Hydro (HEP): Water flowing through dams.

Tidal and Wave: Using the power of the ocean.

Geothermal: Using heat from inside the Earth (volcanic areas).

Solar: Catching energy from the sun.

Did you know? The UK's energy mix is changing. We have reduced our use of domestic coal and oil and are using more renewables and natural gas.

6. Example: Fossil Fuel Extraction

The syllabus requires you to know the advantages and disadvantages of extracting a fossil fuel. Let's look at Natural Gas (Fracking) as our example.

Advantages:

1. It provides a massive bridge fuel that is cleaner than burning coal.

2. It creates thousands of jobs in drilling and engineering.

3. It increases energy security for a country by using its own resources rather than importing from abroad.

Disadvantages:

1. The process uses huge amounts of water, which can be a problem in dry areas.

2. There are concerns that the chemicals used can pollute groundwater.

3. It has been linked to minor earthquakes (tremors), which worries local residents.

7. Example: Local Renewable Scheme in an LIC or NEE

You need to know a local scheme that provides sustainable energy in a poorer country. A common example is Micro-hydro in Chambamontera, Peru.

The Problem: Chambamontera was a remote mountain village with no electricity. People used wood for cooking and kerosene lamps, which produced smoke and were fire hazards.

The Solution: A micro-hydro scheme was built. It uses the force of falling water from mountain streams to turn a small turbine, producing electricity for the whole village.

Why it's sustainable:

1. It has low running costs once built.

2. It uses appropriate technology that the locals can maintain themselves.

3. It doesn't damage the environment (no large dam is needed).

4. It allows children to study at night and businesses to stay open later, improving the quality of life.

8. Sustainable Energy Futures

How do we make sure we have enough energy for the future without destroying the Earth? We focus on Sustainable Resource Futures.

Reducing the Carbon Footprint

A carbon footprint is the total amount of greenhouse gases (like \(CO_{2}\)) produced by our actions. To reduce it, we must shift away from fossil fuels and toward renewables.

Energy Conservation and Efficiency

The cheapest and cleanest energy is the energy we don't use! We can do this through:

1. Demand Reduction: This means using less. For example, using "smart meters" to see how much power we are using or turning off lights when leaving a room.

2. Improved Efficiency: This means getting more "bang for our buck." For example:

Summary Tip: Sustainable energy is like a two-sided coin. Side one is producing cleaner energy (renewables). Side two is consuming less (efficiency and conservation).

Final Quick Review:
- Energy Security: Having enough power at a fair price.
- The Problem: Demand is rising because of population and wealth.
- The Impact: Conflict and environmental damage.
- The Solution: A mix of renewables, better technology, and using less!