Credit: Chris LeBoutillier. "UCR ecologist on geoengineering: a new solution to the climate crisis." UC Riverside News. April 22, 2021.

Climate change is what turns renewable energy from a technical option into an ethical problem.

Modern energy systems have made possible extraordinary forms of mobility, production, communication, agriculture, health care, and economic development. At the same time, fossil-fuel energy systems have also become the major driver of anthropogenic greenhouse gas emissions. The ethical problem is more than just fossil fuels create pollution and add CO2. The deeper problem is that many of the benefits of fossil energy have been distributed unevenly, while many of the harms of climate change are inversely imposed unevenly across communities, regions, species, and generations.

Renewable energy is often presented as a solution to climate change. That is partly correct, but it is not sufficient. Renewable energy technologies do not exist outside of land use, mining, labor, infrastructure, finance, law, public policy, international development, and community life. A renewable energy transition can reduce greenhouse gas emissions while still creating new conflicts over land, water, minerals, jobs, energy prices, infrastructure, and political power.

For that reason, this lesson does not ask only whether renewable energy is necessary. It asks what kinds of obligations follow from climate change, who holds those obligations, and how renewable energy transitions should be evaluated ethically.

The central question for this lesson is:

Given the relationship between fossil energy, greenhouse gas emissions, and climate risk, what obligations do societies have to transform their dependent energy systems, and how should the burdens and benefits of that transformation be distributed (locally, regionally, globally)?

Why This Lesson Matters

Climate change is what supports renewable energy as an ethical urgency. If greenhouse gas emissions create serious and foreseeable harms, then reducing those emissions is more than just a technical challenge. It is also a challenge of responsibility, justice, risk, precaution, and intergenerational obligation.

Climate urgency does not make every renewable energy pathway automatically ethical. The fact that an energy technology is renewable does not answer all of the relevant ethical questions. 

We still need to ask:

• Who benefits from the transition?
• Who pays for it?
• Who is protected?
• Who is displaced or made vulnerable?
• Who has decision-making power?
• Which communities are asked to accept new risks?
• Which harms are reduced, and which harms are shifted elsewhere?
• What obligations do present generations have to future generations?
• What role should public policy play in accelerating, shaping, or limiting particular energy pathways?

This lesson prepares us for the case studies that follow. In Lesson 4, we will examine biofuels in detail. Biofuels are a useful next case because they show that renewable energy systems can still raise serious ethical issues involving land, food, water, labor, biodiversity, public policy, and social justice.

Lesson 3 establishes why energy transition matters. Lesson 4 begins the work of asking whether particular transition pathways are ethically defensible.

Lesson Objectives

By the end of this lesson, you should be able to:

• Explain the relationship between fossil energy use, greenhouse gas emissions, and climate change.
• Describe why climate change creates ethical obligations related to energy systems.
• Identify environmental, social, economic, and political arguments for renewable energy transitions.
• Explain why renewable energy technologies can still create ethical challenges.
• Distinguish between the need for energy transition and the ethical evaluation of specific transition pathways.
• Apply Ethics Matrix B to identify broader social and environmental impacts of energy transition.
• Use the Stakeholder Analysis Matrix to identify affected groups, powerful actors, vulnerable communities, and future or silent stakeholders.
• Identify the top three to five ethical issues that should guide analysis of renewable energy and climate policy.

Key Concepts

This lesson will introduce or reinforce several important concepts:

• greenhouse gas emissions
• climate change
• cumulative emissions
• mitigation
• adaptation
• renewable energy
• energy transition
• net zero
• carbon budgets
• energy-system lock-in
• precaution
• intergenerational justice
• distributive justice
• procedural justice
• energy justice
• just transition
• stakeholder analysis

What is due for Lesson 3?

This lesson will take us one week to complete. Please refer to the Course Syllabus for specific time frames and due dates. Specific directions for the assignment below can be found in this lesson.

Questions?

If you have any questions, please post them to our Questions? discussion forum (not email), located under the Discussions tab in Canvas. I will check that discussion forum daily to respond. While you are there, feel free to post your own responses if you, too, are able to help out a classmate.

Energy use and climate change are inextricably intertwined.

Modern energy systems make contemporary life possible. Energy heats and cools buildings, moves people and goods, powers communication systems, supports agriculture, enables manufacturing, and sustains hospitals, schools, homes, and public infrastructure. Zero energy consumption is not optional. It is built into nearly every part of life.

At the same time, the dominant global energy system still relies heavily on fossil fuels. When coal, oil, and natural gas are burned, they release carbon dioxide and other greenhouse gases. These gases accumulate in the atmosphere, trap heat, and contribute to global warming. This means that energy systems are not only technical systems. They are also climate systems, economic systems, political systems, and ethical systems.

In 2025, global energy-related carbon dioxide emissions reached nearly 38.4 billion metric tons, or about 38.4 gigatons of CO₂. That is approximately 84.7 trillion pounds of carbon dioxide released in a single year from energy-related activity alone.

Fun fact: A number that large is difficult to imagine. One way to visualize it is by comparing it to the approximate displacement weight of the RMS Titanic. By that comparison, one year of energy-related CO₂ emissions is roughly equivalent to the weight of more than 700,000 Titanics. 

Why Cumulative Emissions Matter

Climate change is not caused only by this year’s emissions. It is caused by the accumulation of greenhouse gases over time.

Carbon dioxide remains in the atmosphere long enough that past emissions continue to matter (up to 200 years). This creates an ethical problem across time. Earlier generations received many of the benefits of fossil-fuel energy use, while present and future generations inherit many of the risks. Those risks include sea-level rise, heat waves, drought, flooding, changing agricultural conditions, biodiversity loss, infrastructure damage, public health effects, and increased stress on food, water, and energy systems.

This is why climate change raises questions of intergenerational justice. Present decisions can create benefits now while imposing risks and costs on people who did not participate in those decisions and may have limited ability to protect themselves from the consequences.

Energy Systems Are Not Ethically Neutral

Energy systems distribute benefits and burdens.

Some communities benefit from energy access, jobs, infrastructure, mobility, economic development, and reliable electricity. Other communities may bear disproportionate burdens from extraction, pollution, land disturbance, climate impacts, high energy costs, or unreliable service. The same energy system produces prosperity for some and risk for others.

This means that climate change needs to be seen as a problem of social, political, and economic organization. We need to ask who uses energy, who profits from energy systems, who makes energy decisions, who bears environmental harms, and who is most vulnerable to climate impacts.

These questions are especially important because emissions and vulnerability are not distributed evenly. Some countries, industries, and populations have contributed more to historical greenhouse gas emissions. Some communities have fewer resources to adapt to climate impacts. Some people are more exposed because of geography, poverty, occupation, health status, age, infrastructure, or political exclusion.

Renewable Energy and the Climate Problem

Renewable energy is important because it can reduce dependence on fossil fuels and lower greenhouse gas emissions. Solar, wind, geothermal, hydropower, sustainable bioenergy, energy storage, electrification, efficiency, and transmission infrastructure may all contribute to lower-carbon energy systems.

However, renewable energy should not be treated as automatically ethical simply because it is renewable. Renewable energy systems still require land, minerals, labor, infrastructure, financing, regulation, and public acceptance. They can create conflicts over siting, ownership, environmental impacts, labor conditions, local benefits, energy prices, and community participation.

The ethical task is therefore twofold:

1. Understand why climate change creates strong reasons to reduce fossil-fuel emissions.
2. Evaluate renewable energy pathways carefully so that the transition does not reproduce or create new forms of injustice.

This distinction will matter throughout the rest of the course.

Reading Task

For this part of the lesson, read the assigned climate and energy materials listed in Canvas. These readings provide background on the relationship between energy use, greenhouse gas emissions, climate change, and renewable energy pathways.

As you read, do not try to prioritize every figure or scenario. Instead, focus on the structure of the argument.

Ask:

• How is energy consumption linked to greenhouse gas emissions?
• Why do cumulative emissions matter?
• Why does the timing of emissions reduction matter?
• What role can renewable energy play in reducing climate risk?
• Why might delaying energy-system transformation increase future risks and costs?
• What ethical issues arise when benefits and burdens are distributed unevenly?
• Who is most responsible for reducing emissions?
• Who is most vulnerable to climate impacts?
• Who or what orgs have power over energy-system decisions?

Pay Attention To

As you work through the readings, pay particular attention to the following issues:

1. Scale

Annual energy-related emissions are enormous. Small percentage changes can represent very large changes in actual tons of carbon dioxide. When reading emissions data, ask whether the source is discussing total emissions, annual emissions, cumulative emissions, per capita emissions, or emissions intensity.

2. Time

Climate change is shaped by cumulative emissions. Delayed action can make later action more difficult, more expensive, and more disruptive. Ethical analysis must therefore consider not only what should be done, but when it should be done.

3. Responsibility

Different actors have contributed differently to the problem and have different capacities to respond. Ethical analysis must consider the various positions of governments, firms and orgs, researchers, consumers, communities, and future generations.

4. Vulnerability

Climate harms are not distributed evenly. Some communities are more exposed to climate risks or have fewer resources for adaptation. These differences matter ethically.

5. Transition

Reducing emissions requires energy-system transformation. But transitions have consequences. Workers, communities, landowners, energy users, utilities, investors, and ecosystems may all be affected.

Potential Ethical Questions for Consideration

Use these questions to guide your notes and discussion:

1. Does climate change create an ethical obligation to reduce fossil-fuel emissions?
2. What is the difference between annual emissions and cumulative emissions?
3. What is per capita emissions output, and why does it matter ethically?
4. Should responsibility for emissions reduction be based on current emissions, historical emissions, per capita emissions, wealth, capacity, or some combination of these?
5. Who benefits from fossil-fuel energy systems, and who bears the risks?
6. What obligations do present generations have to future generations?
7. What are the ethical risks of delaying energy-system transformation?
8. What are the ethical risks of pursuing renewable energy transitions too narrowly or too quickly without attention to justice?
9. How should societies balance energy access, affordability, reliability, and emissions reduction?
10. What would count as an ethically defensible energy decision?

Preparing for Part 2

Part 1 establishes the climate basis for renewable energy. Part 2 will ask what obligations follow from that basis.

The key transition is this:

Climate change gives societies strong ethical reasons and political claims to reduce fossil-fuel dependence. But the need to reduce emissions does not automatically tell us which renewable energy pathways are best, who should pay for them, how quickly they should be implemented, or how their benefits and burdens should be distributed.

These questions require ethical analysis.

Credit: Pixabay from Pexels licensed under CC0

In Part 1, we examined the relationship between energy use, greenhouse gas emissions, and climate change. Here in Part 2 we ask what follows from those relationships.

If fossil-fuel energy systems contribute significantly to climate change, then society faces a set of obligations: to reduce emissions, to transform energy systems, to protect vulnerable communities, to avoid imposing unnecessary risks on future generations, and to make decisions based on credible evidence rather than 'optimistic projectionism.' 

However, it is not enough to say that societies should “use renewable energy.” Renewable energy transitions can happen in different ways, at different speeds, with different technologies, costs, risks, and distributions of benefits. Some pathways reduce emissions quickly. Some delay action. Some rely heavily on future technologies. Others protect vulnerable communities. And even more would probably shift burdens onto workers, rural communities, low-income households, Indigenous peoples, ecosystems, or future generations.

This part of the lesson asks how we should evaluate renewable energy pathways as ethical choices.

Energy Scenarios Are Not Predictions

Many energy reports use scenarios to compare possible futures, but scenarios are not predictions. These reports are a structured way of asking what may happen if certain assumptions, policies, investments, behaviors, and technologies develop in particular ways.

Energy scenarios help us ask questions such as, What happens if:

• Current policies continue?
• Governments implement the policies they have stated but not fully enacted?
• Societies pursue a pathway consistent with net-zero emissions?
• Energy demand grows faster than expected?
• Renewable deployment is delayed?
• Energy efficiency improves rapidly?
• New fossil-fuel infrastructure continues to be built?
• Climate action depends too heavily on future carbon removal technologies?

These are both technical questions alongside being ethical questions because each pathway distributes risks, costs, and benefits differently. And this is where ethical questions become technical design considerations.

From the 450 Scenario to Net Zero

Older climate and energy reports often used the “450 Scenario,” which referred to pathways designed around stabilizing greenhouse gas concentrations near 450 parts per million of carbon dioxide equivalent. That scenario was useful historically because it helped connect energy policy to climate stabilization targets.

For this course, however, we will use newer scenario language. Current energy and climate discussions more often focus on net-zero emissions, carbon budgets, current policies, stated policies, and pathways for limiting warming.

The important ethical issue remains the same: energy scenarios help us compare what is likely under current patterns with what may be required to avoid more dangerous climate outcomes.

The question is no longer:

Is there an obligation to meet the 450 Scenario?

Rather, it should be:

Given what we know about climate risk, what obligations do societies have to pursue energy pathways that reduce emissions quickly, fairly, and credibly?

Pathways and Ethical Judgment

Potential renewable energy pathways should be evaluated by more than technical feasibility. They should be evaluated based on impacts, and this is where ethics become a means for evaluation.

A pathway is like a circuit connecting material and industrial resources, energy, economic and political power. A pathway may be technically possible but politically weak, or it may be economically efficient but socially unjust. These pathways may reduce emissions while creating land-use conflicts. They may even protect future generations while creating near-term costs for workers or low-income households. Given pathways may improve national energy security while increasing extraction pressures for critical minerals. And they may accelerate electrification while leaving some communities exposed to higher energy burdens.

Ethical evaluation requires asking:

• What harms does this pathway reduce?
• What new harms might it create?
• Who benefits?
• Who pays?
• Who has power over the decision?
• Who is excluded from decision-making?
• Who bears risk if the pathway fails?
• What happens if action is delayed?
• What obligations do present generations have to future generations?
• What role should governments, firms, researchers, and citizens play?

Emissions Lock-In

One of the most important concepts in this lesson is emissions lock-in.

Energy systems are built from long-lasting infrastructures: power plants, pipelines, refineries, vehicles, buildings, transmission lines, appliances, industrial facilities, roads, ports, and supply chains. These systems also include laws, subsidies, habits, markets, business models, labor arrangements, and political interests. Always remember Infrastructure Rule Number 3... You Build It, You Own It.  

Once these systems are built, they are difficult to change quickly. A new fossil-fuel power plant or pipeline does not only create emissions today. It can create expectations, investments, jobs, contracts, and political pressure to keep using that infrastructure for decades.

This is why delay matters ethically. Delayed action can make later action more costly, disruptive, and unjust. It can also shift greater burdens onto future generations. And, the overall transition becomes even more abrupt. The value in investing now is that the transition, while it will be more efficient in the future, will also be less of a cliff that needs to be climbed. I think this is what drives things like balcony solar. 

The ethical concern here is not only how much carbon is emitted this year. The main issue is whether present decisions build systems that make future emissions harder to avoid.

Energy Efficiency and Renewable Energy

Energy efficiency and renewable energy are synergistic strategies. In practice, they are deeply connected.

Renewable energy reduces emissions by replacing fossil-fuel energy sources with lower-carbon energy sources. Energy efficiency reduces emissions by lowering the amount of energy required to provide the same service. Both contribute.

Efficiency can reduce the scale of the transition required. If buildings, vehicles, industrial systems, and appliances use less energy, then fewer energy resources and less infrastructure may be needed to meet demand. Renewable energy can then replace fossil fuels more effectively. Electrification, efficiency, storage, transmission, demand response, and low-carbon fuels are aligned across separate ethical choices.

The ethical question is how societies should combine them to reduce emissions, protect vulnerable communities, maintain reliable energy access, and avoid unnecessary harms, and not is not whether efficiency or renewable energy is “better” in the abstract.

Public Policy and Obligation

Energy transitions do not happen through technology alone. They require public policy, investment, regulation, planning, infrastructure, research, and social coordination.

Public policy can accelerate renewable deployment, support energy efficiency, protect workers, reduce energy burdens, regulate pollution, guide infrastructure siting, and prevent unjust distributions of risk. Poorly designed policy can also produce harms: higher costs for vulnerable households, weak labor protections, extractive land-use arrangements, unequal access to clean energy, or new environmental burdens.

This is why renewable energy is not only an engineering problem. It is also a governance problem.

Ethical questions about policy include:

• Should governments invest more aggressively in renewable energy infrastructure?
• Who should pay for the transition?
• How should costs be distributed?
• How should workers and communities dependent on fossil-fuel industries be supported?
• How should energy affordability and reliability be protected?
• How should public participation be included in siting and infrastructure decisions?
• How should policy prevent new forms of environmental injustice?

Applying Ethics Matrix B

Use Ethics Matrix B to identify the broader social and environmental impacts of renewable energy pathways.

For this part of the lesson, focus especially on:

• Public policy: What regulations, investments, incentives, or planning systems are required?
• Social justice: How are benefits and burdens distributed?
• Intergenerational justice: Are present decisions protecting or burdening future generations?
• Transformations in economy and society: How does energy transition alter work, infrastructure, mobility, land use, daily life, and production?
• Risk and precaution: What risks arise from delay, from rapid transition, or from dependence on uncertain future technologies?

Do not try to say something about everything. Use the matrix to identify the top three to five ethical issues that matter most. The ranking is there to help you narrow down what to focus on.

Applying the Stakeholder Analysis Matrix

Use the Stakeholder Analysis Matrix to identify who is affected by renewable energy transition and who has power over it.

Possible stakeholders include:

• fossil-fuel workers,
• renewable-energy workers,
• utilities,
• low-income households,
• energy consumers,
• rural communities,
• Indigenous communities,
• frontline climate-vulnerable communities,
• policymakers,
• regulators,
• investors,
• energy companies,
• energy-intensive industries,
• future generations,
• ecosystems,
• and countries with different levels of historical emissions and development needs.

As you analyze stakeholders, distinguish among:

• Primary stakeholders, who are directly affected;
• Secondary stakeholders, who are indirectly affected;
• and Key stakeholders, who have significant power to shape outcomes.

Pay special attention to mismatches between power and vulnerability. Some stakeholders have substantial influence over energy decisions while bearing fewer climate or transition risks. Other stakeholder groups may be highly affected but have little power over the decisions that shape their futures.

Pay Attention To

As you complete the readings, pay attention to:

• the difference between current-policy, stated-policy, and net-zero pathways;
• the role of energy efficiency, electrification, renewables, low-carbon fuels, and methane reduction;
• emissions lock-in from fossil-fuel infrastructure;
• the risks of delaying action;
• the role of public policy in shaping energy futures;
• the difference between technical feasibility and ethical defensibility;
• the distribution of benefits and burdens across communities and generations;
• the stakeholders who have power over energy decisions;
• and the stakeholders who bear risks without having much influence.

Potential Ethical Questions for Consideration

Use the following questions to guide your notes, matrix work, and discussion:

1. Drawing from the matrices, what ethical obligations follow from the relationship between fossil energy use and climate change?
2. Is there an obligation to pursue a net-zero energy pathway? If so, who holds that obligation?
3. What is emissions lock-in, and why does it matter ethically?
4. What responsibilities do present generations have to avoid creating energy systems that burden future generations?
5. Is energy efficiency an ethical obligation, or only a practical strategy?
6. Is there an obligation to invest in renewable energy innovation and infrastructure? By whom, and when?
7. How should societies balance speed, affordability, reliability, justice, and emissions reduction?
8. Who benefits from rapid energy transition?
9. Who might be harmed by rapid or poorly designed transition?
10. Who benefits from delaying transition?
11. Who is placed at risk by delay?
12. Why should decision-makers take energy and climate scenarios seriously, even though scenarios are not predictions?

Preparing for Lesson 4

This lesson explains why climate change creates ethical reasons to transform energy systems. Lesson 4 will move from this broad question to a specific case: biofuels.

That transition is important.

Climate change may create an obligation to reduce fossil-fuel dependence, but that does not mean every renewable pathway is automatically ethical. Biofuels show why we need to examine particular technologies and systems carefully. A fuel may be renewable and still raise serious questions about land, food, water, labor, biodiversity, public policy, and justice.

The goal moving forward is to hold both ideas together:

Energy transition is ethically necessary.

Specific transition pathways still require ethical evaluation.