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When we discovered the use of coal we started investing in trains, which transported almost everything after this discovery.
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This is when we use the breezes of the wind to our advantage, such as using sails and windmills. I said July 4, 1776 because this is the oldest known source of energy to man. The United States became a nation on this date so we've had it ever since we've been a nation. This is not when we first discovered it.
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This has been used as a source of heat energy since man discovered fire.
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Grylls Adams and Richard Day discovered solar energy when selenium is exposed to light it creates electricity
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We started using hydroelectricity around Niagara Falls.
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Electricity came around during this time.
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Geothermal energy is thermal energy stored into the planet.
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We discovered this during World War 2. We focused this on the atomic bomb.
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This is a type of hydropower. This is pretty expensive. It uses water barrages. These are on the ocean floor.
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This is the generation of energy by nuclear fusion.
