Introduction to Energy Choices – Video
Summary
Introduction to Energy Choices
This video introduces students to how societies decide which energy resources to use. Every energy source has benefits and challenges, and energy choices are often based on four key attributes: affordable, available, reliable, and sustainable.
Students learn that affordability plays a major role in energy decisions. In many cases, the price of energy strongly influences which resources are used. Some environmental impacts, such as pollution, may not always be reflected in the cost of energy, which can affect how different energy sources compete in the marketplace. Governments may also use subsidies to support newer energy technologies, though long-term affordability remains an important factor.
The video also explains how availability influences energy systems. Countries often rely on energy resources that are locally abundant, such as hydropower in mountainous regions, geothermal energy in volcanic regions, or solar energy in sunny climates. When energy resources are not locally available, transportation systems such as pipelines or shipping networks can make it possible to move energy across regions and countries.
Reliability is another important factor in energy choices. Societies depend on energy systems that can consistently meet demand. Some energy resources produce electricity continuously, while others depend on weather conditions or other natural factors, requiring backup systems to ensure reliable supply.
Finally, the video explores sustainability, which includes environmental impacts such as air emissions, water use, land use, and the long-term management of resources. Evaluating energy systems across all four attributes helps explain why different regions rely on different energy sources and how energy decisions may evolve in the future.
This resource supports lessons on energy systems, environmental science, sustainability, and energy policy, helping students understand the tradeoffs involved in meeting global energy demand.
This video is part of the Introduction to Energy Choices Lesson. Pair this video with lessons on Environmental Impacts of Energy, Energy Efficiency, or Energy Poverty to help students explore how energy systems are evaluated and chosen.
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Transcript:
[Dr. Scott W. Tinker] Every energy resource has benefits and challenges, pros and cons. So why do we choose the ones we do? It’s based on four attributes. Affordable, available, reliable, and sustainable. First is affordable. It’s hard for an expensive resource to compete in the open market with a cheap one. For better or worse, we make most energy choices based on price. Affordability is based partly on what we don’t pay. For instance, pollution from some energies is released at no cost. Paying for these so-called externalities would raise their price and bring competing sources closer together. But if some countries do this and others don’t, it creates a market disadvantage. Not an easy problem. At the moment, subsidies bring down the cost of expensive new technologies, but we can’t afford to subsidize them forever. And energy that’s not affordable is ultimately not sustainable. Second is available. We tend to use what we have where we have it. Hydro in Norway, geothermal in Iceland, solar in Spain. If it’s not locally available, it needs to be easy to move. Most countries use more oil than they have, but oil has a highly developed transportation network, which has made a regional resource into a global commodity. Reliable is next. Can we rely on a consistent supply? With oil, hurricanes and wars have sometimes disrupted that global trade. But there are bigger reliability issues. Wind and solar produce electricity intermittently. It’s their major challenge, meaning we have to back them up with a more reliable, on-demand resource. More recently, there’s sustainable which includes water, land use for mining, deployment and disposal, and air and atmospheric emissions. Every energy can be evaluated in terms of being affordable, available, reliable, and sustainable. The energies that best meet these four criteria will be the energies that we choose to use in the future.