Where does our energy come from, and which sources can last?
Distinguish renewable from non-renewable energy resources, describe the main sources (fossil fuels, nuclear, solar, wind, hydro, geothermal) and weigh their advantages and environmental costs.
A Regents answer on energy resources: the difference between renewable and non-renewable resources, the main sources (coal, oil and gas, nuclear, solar, wind, hydroelectric, geothermal), how fossil fuels form over geologic time, and the advantages and environmental costs of each for the Earth and Space Sciences exam, with worked exam questions.
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What this topic is asking
The Regents (and the new Earth and Space Sciences exam) wants you to distinguish renewable from non-renewable energy resources, describe the main sources, and weigh their advantages and environmental costs. The defining idea is the timescale: renewables are replenished as fast as we use them; non-renewables are not.
Renewable versus non-renewable
How fossil fuels form
The main sources and their trade-offs
| Source | Renewable? | Advantage | Environmental cost |
|---|---|---|---|
| Coal, oil, gas | No | Energy-dense, reliable, cheap | Carbon dioxide and pollutants, climate change |
| Nuclear (uranium) | No | High output, low carbon | Radioactive waste, accident risk |
| Solar | Yes | Clean, abundant | Intermittent (no Sun at night), land/manufacturing |
| Wind | Yes | Clean, no fuel | Intermittent, sites and wildlife |
| Hydroelectric | Yes | Reliable, no carbon | Dams disrupt rivers and habitats |
| Geothermal | Yes | Steady, low carbon | Limited to certain locations |
The big-picture Regents idea: there is no perfect source. Fossil fuels dominate today because they are cheap and energy-dense, but their carbon dioxide drives climate change, which pushes the shift toward renewables.
Try this
Q1. State the difference between a renewable and a non-renewable energy resource. [1 point]
- Cue. A renewable resource is replenished on a human timescale; a non-renewable resource forms far more slowly than it is used and is effectively used up.
Q2. Name two renewable and two non-renewable energy sources. [2 points]
- Cue. Renewable: any two of solar, wind, hydroelectric, geothermal. Non-renewable: any two of coal, oil, natural gas, nuclear (uranium).
Exam-style practice questions
Practice questions written in the style of NYSED exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
Regents (style)1 marksPart A. Which of these is a non-renewable energy resource? (1) wind (2) solar (3) coal (4) hydroelectric. Justify your choice.Show worked answer →
A 1-point multiple-choice question. The answer is (3).
Coal is a fossil fuel that forms over millions of years, far longer than it is used, so once burned it is effectively gone; it is non-renewable. Wind (1), solar (2) and hydroelectric (4) are renewable, because they are continually replenished by the Sun and Earth's systems on a human timescale. The trap is forgetting that fossil fuels are technically of biological origin but take geologic time to form, so they do not renew on a human timescale.
Regents (style)3 marksPart C. (a) Explain the difference between a renewable and a non-renewable energy resource. (b) Describe how a fossil fuel such as coal forms. (c) State one advantage and one environmental cost of burning fossil fuels for energy.Show worked answer →
A 3-point extended-response question.
(a) 1 point: a renewable resource is replenished on a human timescale (solar, wind, hydro, geothermal); a non-renewable resource forms far more slowly than it is used and is effectively used up (fossil fuels, nuclear fuel).
(b) 1 point: coal forms from the remains of ancient plants that were buried in swamps and, over millions of years of heat and pressure, were compressed and altered into coal.
(c) 1 point: advantage, fossil fuels are energy-dense, reliable and currently inexpensive; environmental cost, burning them releases carbon dioxide (a greenhouse gas) and other pollutants, contributing to climate change and air pollution.
Markers reward the renewable/non-renewable distinction by timescale, the burial-and-alteration origin of coal, and a valid advantage plus a valid environmental cost.
Related dot points
- Describe Earth's key natural resources (water, soil, minerals, air, forests) and explain how resource management, conservation and sustainability balance human needs against the limits of Earth's systems.
A Regents answer on natural resources and management: the difference between renewable and non-renewable resources, the key resources (fresh water, fertile soil, minerals, air, forests), the meaning of conservation and sustainability, why resources are unevenly distributed, and how management balances human needs against Earth's limits, with worked exam questions.
- Explain how human activities (pollution, deforestation, land use, resource extraction) affect Earth's atmosphere, hydrosphere, geosphere and biosphere, and evaluate ways to reduce harm.
A Regents answer on human impact: how pollution, deforestation, land use and resource extraction affect the atmosphere, hydrosphere, geosphere and biosphere, examples such as air and water pollution, soil erosion and habitat loss, the idea of Earth's interconnected systems, and how to evaluate solutions, for the Earth and Space Sciences exam, with worked exam questions.
- Explain the greenhouse effect and the role of greenhouse gases, distinguish natural from human-enhanced climate change, and describe the evidence for and consequences of recent global warming.
A Regents answer on the greenhouse effect and climate change: how greenhouse gases (carbon dioxide, methane, water vapor) trap outgoing infrared energy and warm the surface, natural versus human-enhanced warming from burning fossil fuels, the evidence (rising carbon dioxide and temperature, melting ice, rising seas) and consequences, with worked exam questions.
- Describe how carbon cycles among the atmosphere, biosphere, hydrosphere and geosphere through photosynthesis, respiration, decomposition and combustion, and explain how human activities alter the carbon cycle.
A Regents answer on the carbon cycle: how carbon moves among the atmosphere, biosphere, hydrosphere and geosphere through photosynthesis, respiration, decomposition and combustion, the role of carbon sinks (oceans, forests, fossil fuels), and how burning fossil fuels and deforestation move stored carbon into the air, with worked exam questions.
- Describe major natural hazards (earthquakes, volcanoes, severe weather, floods) and explain how forecasting, monitoring and preparedness use Earth science to reduce their impact on society.
A Regents answer on natural hazards and society: the main geologic and weather hazards (earthquakes, volcanoes, hurricanes and severe storms, floods), why they cluster in certain places, and how Earth science (forecasting, monitoring, hazard maps, warning systems and preparedness) reduces their impact, for the Earth and Space Sciences exam, with worked exam questions.
Sources & how we know this
- Earth and Space Sciences — New York State Education Department (2026)
- Regents Examination in Physical Setting/Earth Science — New York State Education Department (2026)