--- title: "Renewable vs non-renewable energy" description: "Distinguish renewable resources, including solar, wind, hydroelectric, tidal, geothermal and replenished biomass, from non-renewable fuels such as coal, oil, gas and uranium. Compare cost, reliability" canonical: https://lightmysky.com/learn/science/renewable-vs-non-renewable-energy-mt_w2A8D76ymp source: https://lightmysky.com/learn/science/renewable-vs-non-renewable-energy-mt_w2A8D76ymp.md retrieved: 2026-10-19 --- > **Agent view.** This is the Markdown twin of the page, for tools and assistants. > When to use this site, and the call that answers each job: https://lightmysky.com/agent-instructions.md > API description (OpenAPI 3.1): https://lightmysky.com/openapi.json · Authentication: https://lightmysky.com/auth.md > Pricing: https://lightmysky.com/pricing.md · Catalog: https://lightmysky.com/llms.txt · Full catalog: https://lightmysky.com/llms-full.txt > Every machine-readable file on this domain: https://lightmysky.com/.well-known/ai-catalog.json > Ask for Markdown with `Accept: text/markdown`, a `.md` address, or `?mode=agent`. # Renewable vs non-renewable energy Distinguish renewable resources, including solar, wind, hydroelectric, tidal, geothermal and replenished biomass, from non-renewable fuels such as coal, oil, gas and uranium. Compare cost, reliability and environmental impacts. Subject: Science · Area: Energy · Ages 12 to 14 Page: https://lightmysky.com/learn/science/renewable-vs-non-renewable-energy-mt_w2A8D76ymp ## Ready when they can - Lists at least four renewable and three non-renewable energy resources - Explains what makes a resource renewable or non-renewable - Compares the environmental impact of at least two different energy sources (e.g. wind vs coal) - Discusses trade-offs between cost, reliability, and environmental impact in choosing energy resources ## Lesson: Renewable vs non-renewable energy Renewable resources are renewed by natural processes on human timescales. Examples are solar, wind, hydroelectric, tidal, geothermal and biomass. Biomass supplies must be replaced as they are used. Coal, oil and natural gas formed over millions of years and are not replaced quickly enough for our use. Uranium is a finite mined nuclear fuel, so it is non-renewable too. Nuclear plants release energy by splitting nuclei, not by burning uranium. *(drawing: Wind generation uses moving air without burning fuel.)* Weather processes keep producing wind; uneven heating helps drive them. Renewable does not mean available everywhere or at every moment. Wood supplies shrink if trees are cut faster than they regrow. Geothermal sites also need management to avoid removing useful heat faster than it is replenished. Coal and gas burning release CO2, adding to climate change. Wind and solar generation burn no fuel, but making their equipment has impacts. Wind farms can affect wildlife; dams change river habitats. Biomass burning releases CO2 and air pollutants. Nuclear generation has low CO2 emissions but produces radioactive waste. Each resource needs its own environmental comparison. **Example.** A town compares wind alone with the same wind farm plus gas backup. Adding backup costs more to build. If enough fuel and backup capacity are available, gas can cover calm-day shortfalls, but releases CO2 when used. Weigh the added building cost against the improved supply and emissions when gas runs. A plan must state what covers demand when wind output falls. Solar output depends on sunlight and stops at night. Wind output depends on wind speed. Suitable geothermal plants can provide steady output, while tidal timing is predictable. All plants need maintenance. Storage or another available supply can cover shortfalls. For all-day demand, subtract hours fully covered by solar from 24. If solar covers 9 hours and there is no stored energy, another supply is needed for 24 - 9 = 15 hours. **Recap.** Renewable describes natural renewal, not zero impact or constant output. Compare cost, reliability and environmental effects, including resource management and supplies for shortfalls. ## Practice 8 questions on this page, each with its working shown. ## Needs first - [Energy stores and transfers](https://lightmysky.com/learn/science/energy-stores-and-transfers-mt_Jvg_r4yWaY) - [Earth's Atmosphere & CO2](https://lightmysky.com/learn/science/earths-atmosphere-and-co2-mt_mTpV-0rtkO) ## Opens up - [Net Zero & Energy Transition](https://lightmysky.com/learn/science/net-zero-and-energy-transition-mt_Wzj1RETm9A)