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Energy sources buried under the Earth's surface in the form of oil, coal, or natural gas.  Geologic processes and high pressure transform the bodies of dead plants and animals into fossil fuels over very long periods of time.

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Energy sources buried under the Earth's surface in the form of oil, coal, or natural gas.  Geologic processes and high pressure transform the bodies of dead plants and animals into fossil fuels over very long periods of time.

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These resources are in limited supply and cannot be replaced once it has been used.  Most are fossil fuels because they take such a long time to be produced.

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These resources are in limited supply and cannot be replaced once it has been used.  Most are fossil fuels because they take such a long time to be produced.

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300 years of fossil fuels in 300 seconds

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Fossil fuels are fuels formed by natural processes such as anaerobic decomposition of buried dead organisms. The age of the organisms and their resulting fossil fuels is typically millions of years, and sometimes exceeds 650 million years. Explore this lesson to learn all you ever needed to know about fossil fuels.

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An energy source that can replenish itself or has an unlimited supply.  This supply will not run out for millions of years.

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An energy source that can replenish itself or has an unlimited supply.  This supply will not run out for millions of years.

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Iceland is a geothermal energy pioneer. Their unique geology, thanks to volcanism along a rift in the Eurasian tectonic plate and North American tectonic plate, provides a sustainable advantage: Heat from the ground. With this geothermal heat and innovative engineering, Iceland can provide hot water and electricity in their homes, warm their snowy streets, produce fresh local vegetables, and more.

In the BBC Earth Lab video above, science presenter Greg Foot explains that around 25% of Iceland's electricity comes from geothermal sources. "The rest comes from hydropower, which means, incredibly, that all of Iceland's power comes from clean renewable sources."

What can we learn from this innovative system? Watch: How has geothermal energy revolutionized Iceland's greenhouses?

Then watch more videos about Iceland, including Volcano Bread and Searching for Life in Iceland's Frigid Fissures.

Plus: The Surprising Places We Waste Energy and how is Australia using seawater and sunlight to grow sustainable food in the desert?

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Geothermal energy in Iceland | The Kid Should See This

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Iceland is a geothermal energy pioneer. Their unique geology, thanks to volcanism along a rift in the Eurasian tectonic plate and North American tectonic plate, provides a sustainable advantage: Heat from the ground. With this geothermal heat and innovative engineering, Iceland can provide hot water and electricity in their homes, warm their snowy streets, produce fresh local vegetables, and more.

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We thought we could never use up the forests, trees, soil, plants and water. We were wrong. Learn how we can renew our precious natural resources!