system
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human
Expand this paragraph about renewable energy with one example of a renewable energy source.

'Renewable energy is energy produced from sources that can replenish themselves naturally. It includes solar, wind, and hydroelectric power.'
gpt
Renewable energy is energy produced from sources that can replenish themselves naturally. It includes solar, wind, and hydroelectric power. For instance, geothermal energy, which is produced from the Earth's natural heat, is another example of a renewable energy source.