Power Choices
Every way of generating power is a trade-off. Weigh renewables against fossil fuels and nuclear on reliability, environment and cost — and learn why the smart answer is usually a mix.
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Power Choices ⚡
Keeping the lights on is a balancing act. Every energy resource has a price — in money, in reliability, or in damage to the planet. There is no perfect option, so engineers and governments must weigh the trade-offs. In this module you will learn to do the same.
Renewable vs non-renewable 🔋
Energy resources split into two groups: • **Renewable** — replenished as fast as we use them, so they never run out: **solar, wind, hydroelectric, tidal, wave, geothermal** and **bio-fuel**. • **Non-renewable** — finite, so they will run out: the **fossil fuels** (**coal, oil, gas**) and **nuclear fuel**.
Which are renewable?
Select ALL THREE of these energy resources that are renewable.
- Wind
- Solar
- Tidal
- Coal
- Natural gas
- Nuclear
What is it all for? 🏭
We draw on these resources for three main jobs: • **Generating electricity** (power stations) • **Transport** (petrol and diesel for cars, kerosene for planes) • **Heating** (gas boilers, electric heaters) Transport and heating still lean heavily on fossil fuels, which is why switching them to cleaner resources is such a challenge.
No free lunch ⚖️
Choosing a resource means weighing three things against each other: • **Reliability** — is the power there whenever we need it? • **Environmental cost** — greenhouse gases, waste, habitat damage? • **Economics and practicality** — build cost, running cost, suitable locations? A good answer names a **specific** strength AND a **specific** weakness for each resource — never a one-sided list.
Match each resource to its trade-off
- Coal
- Nuclear
- Solar
- Hydroelectric
- Reliable and cheap to run, but releases CO₂ and is finite
- Reliable with very low CO₂, but produces radioactive waste
- No CO₂ while running, but generates nothing at night
- Reliable and renewable, but flooding valleys destroys habitats
The truth about nuclear
Which statement about nuclear power is correct?
- It is non-renewable and makes radioactive waste, but releases very little CO₂
- It is a renewable resource that never runs out
- It is a fossil fuel that releases a lot of CO₂
- It produces no waste or hazards of any kind
The catch with wind
A country relies heavily on wind power. On a still, windless day, what is the main problem?
- Wind is intermittent, so little electricity is generated when there is no wind
- The turbines release CO₂ when it is calm
- The wind resource runs out permanently, like coal
- The turbines start producing radioactive waste
The town's decision
An interactive activity.
Choices summary
Resources like solar and wind are _____ because they are replenished as fast as they are used, while coal, oil and gas are _____ fossil fuels that release _____. No resource is perfect, so choosing one means balancing reliability, cost and _____ impact.