Energy Supply Factors

A reserve is not a supply

Consumption of energy is climbing worldwide, driven by population growth and by industrialisation, and it is distributed extraordinarily unevenly. Around 750 million people have no access to electricity at all and roughly 2 billion cook on fuels that damage their health, while the average person in a high-income country uses many times the energy of someone in a low-income one. Energy use per person is in fact one of the standard indicators of development, precisely because it tracks so closely with everything else. Fossil fuels still supply something like 80 per cent of the world's primary energy. The mistake this topic punishes is assuming that having a resource means having a supply. Oil in the ground, sunshine on a desert and a river in a gorge are all potential; whether any of them becomes electricity in a socket depends on four separate things. Where it is, which geology and climate decided long ago. What it costs to get at, which is why deep offshore oil is worth extracting when prices are high and abandoned when they are low. Whether the technology exists, which is why shale gas was worthless until the method of reaching it was developed. And whether politics allows it to move, because pipelines cross borders and borders have governments. The United Kingdom is a clear demonstration. Around the year 2000 it was self-sufficient in energy thanks to North Sea oil and gas; by about 2004 it was a net importer, not because the geology had changed but because the accessible fields were depleting while demand did not. Its last coal-fired power station closed in 2024. Same country, same rocks, a completely different energy position within a generation. This module covers those factors and what happens when they fail: the impacts of energy insecurity. What to do about it, meaning renewables, nuclear and the rest, belongs to the sibling module.

Five energy terms

The first three describe a country's position, the fourth is what goes wrong, and the fifth is the one students define too narrowly.

How a country loses its security

These six stages describe a country moving from energy security to insecurity. Put them in order.

• Domestic fields supply more than the country needs, and some is exported
• The most accessible deposits are worked out and output from them begins to fall
• Demand keeps rising as population grows and the economy expands
• A gap opens between what is needed and what can be produced at home
• The shortfall is met by importing, often from a small number of suppliers
• Prices and continuity of supply now depend on decisions taken in other countries

Why does having a resource not mean having a supply?

A country with substantial oil reserves can still be energy insecure. Which answer explains that best?

• Four separate conditions have to be met before a resource becomes a usable supply, and geology only satisfies the first. The deposit has to be physically reachable; the cost of extracting it has to be below what the fuel can be sold for, which is why difficult reserves are worked when prices are high and abandoned when they fall; the technology to reach and process it has to exist, which is why some deposits were worthless until a method was developed; and the political situation has to permit extraction and transport, since pipelines cross borders and conflict, sanctions or instability can stop a flow that is physically perfectly possible.
• The reserves are probably smaller than reported.
• Oil is not a renewable resource, so it cannot provide security.
• Demand always grows faster than any country can produce.

The four conditions, grouped

The specification names physical availability, cost, technology and political factors. Read these as a set of conditions that must all hold, rather than as a list of separate influences, because a question about energy supply is usually asking which one has failed.

Match each situation to the factor

Explain why they go there

The specification note for this node warns against a generic narrative in which fossil fuels are simply bad, and asks for economic benefit and environmental cost to be weighed against one another. That note governs the case study in the sibling module, and the same discipline applies to the second key element here, which is about the impacts of energy insecurity. When you write about exploration in difficult or environmentally sensitive places, whether that means deep water, the Arctic or tar sands, the weak answer lists the environmental damage and stops. It has not explained the thing the question is actually about, which is why anybody goes there. Nobody drills in deep water for pleasure. They go because accessible deposits are depleting, demand is not, and a country facing an energy gap will pay a great deal for security of supply. Say that first, then give the cost, and you have an explanation rather than a complaint. Then weigh them honestly. The benefits are employment, revenue, and independence from foreign suppliers. The costs are financial risk, because difficult extraction is expensive and viable only at certain prices, and environmental damage that is harder to contain the more remote the operation is. The Deepwater Horizon blowout in the Gulf of Mexico in 2010 killed eleven people and released of the order of four million barrels, and the depth that made the field attractive is the same depth that made the leak so difficult to stop. That is one fact arguing both ways, which is always the strongest material you can bring. One boundary to respect. This element asks for the causes of insecurity and its impacts. What to do about it, meaning renewable schemes, nuclear stations and carbon capture, is the next module, so name a solution in a clause if you must and do not spend a paragraph on it here.

Complete the energy supply facts

Around _____ million people have no access to electricity, while fossil fuels still supply roughly 80 per cent of the world's primary energy. A deposit only becomes a usable supply if four conditions hold: it must be physically reachable, the _____ of extraction must be below what the fuel can be sold for, the technology to reach it must exist, and the political situation must allow it to be moved. That is why the United Kingdom went from being self-sufficient in energy around the year 2000 to being a net _____ by about 2004 without its geology changing at all. The shortfall between what a country needs and what it can produce itself is called the energy _____. When insecurity bites, exploration moves into difficult places, and whatever made the Gulf of Mexico field worth developing in 2010 was precisely what put the resulting _____ beyond easy reach.

Spot the three sound statements

Select the THREE statements that could stand as they are in an answer.

• Explaining exploration in difficult places has to begin with why it happens, since the easy fields are running down while the need for fuel keeps climbing, and a state short of supply will pay heavily to be certain of it.
• A single field can supply the argument on both sides at once, since whatever made it worth developing in the first place is usually what made the 2010 spill so hard to reach and bring under control.
• A country's energy position can change completely within a generation without its geology changing at all, because cost, technology and politics move even when the rocks do not.
• A country with large reserves of a fuel is by definition energy secure.
• The impacts of energy insecurity are best explained by pointing out that fossil fuels damage the environment.
• Energy insecurity has no effect on food supply, since the two are separate resources.

A 6-mark impacts answer, marked

Explain the impacts of energy insecurity. [6 marks] The first impact is on price and therefore on everything that energy touches. When a country cannot meet demand from its own resources it must import, and because it is buying in a world market it pays whatever that market demands; the OPEC embargo of 1973 quadrupled the oil price and the effects reached every economy that depended on it. Since almost all manufacturing and transport requires energy, those costs pass into the price of goods, which means insecurity is felt by households that never think about energy policy at all. A second impact is that exploration is pushed into places that would not otherwise be worth the risk. As accessible deposits deplete while demand continues to rise, companies move into deep water, into the Arctic and into deposits such as tar sands that are expensive and difficult to process, because a country facing a shortfall will pay a great deal for security of supply. This brings real economic benefit in revenue and employment, and it also raises the environmental cost, because damage in a remote or deep location is far harder to contain: the Deepwater Horizon blowout in the Gulf of Mexico in 2010 killed eleven people and released of the order of four million barrels, and the depth that had made the field attractive was precisely what made the leak so hard to stop. A third impact reaches food, since fertiliser manufacture depends on gas and irrigation depends on pumping, so a rise in energy prices raises food prices too and the countries least able to absorb either are affected most. What earned the marks: three distinct impacts rather than three versions of one; each explained as a chain from insecurity to consequence rather than asserted; the exploration point given its reason before its cost, which is what the specification note asks for; and a single fact, the depth of the field, used to argue both the attraction and the risk.

Find the two that explain rather than complain

Five sentences about drilling in difficult environments. Three of them only state that it is damaging. Tap the TWO that explain why it happens or weigh it properly.

• Companies move into deep water and the Arctic because the accessible fields are depleting while demand is not, and a country facing a shortfall will pay heavily for security of supply.
• Drilling in the Arctic would cause serious harm to a fragile environment.
• The remoteness that makes such a field commercially worth developing is the same remoteness that makes any spill from it far harder to reach and contain.
• Oil spills damage wildlife and coastlines.
• Fossil fuel extraction in sensitive areas should not be permitted.

Build the reserve-and-supply sentence

Assemble the sentence that states the central idea of this element.

Four supply problems

You advise on energy policy. In each case, work out which condition has failed before proposing anything.

• Gas stops arriving through a pipeline. The field at the far end is producing normally and the pipeline itself is undamaged.
• A deep offshore field that was under development is suddenly mothballed. Nothing about the geology or the technology has changed.
• Domestic output has been declining for a decade while demand has risen steadily, and imports now cover a growing share of consumption.
• A student writing about Arctic exploration lists the environmental damage in detail and concludes that it should not be allowed.

Explain the factors

Explain the factors that affect the supply of energy, and the impacts of energy insecurity. [9 marks]

• A resource in the ground is not a supply available to people
• Physical availability, cost, technology and political conditions can each stop a known deposit reaching anyone
• Supply changing with unchanged geology proves the point better than any definition
• Impacts: price, pushing into difficult or sensitive areas, food
• Economic benefit weighed against environmental damage, not damage alone