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In the 18th Century, fire wood and animal labor were used for energy.
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Steam engines have been invented, and they use steam as a source of energy,
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The first battery was invented in this year,
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The first electric motor was invented in 1821.
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Wind power is now used somewhat. For years, people have used sailboats, with wind powering the boat.
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Coal is now a major source of energy, this is due to the increase of railroads.
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Gas is now a source of energy. The introduction of cars lead to lots of gas stations.
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The solar cell was discovered in this year. Soon after it's discovery, the solar panel was created.
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Burning municipal solid waste can produce energy.
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The electric car was invented, because of rising gasoline prices.