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Most of the energy that we use here on Earth came from the Sun as sunlight. (Light from the Sun takes around eight minutes to travel to the Earth.)
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When the energy in sunlight is harnessed using a device called a solar panel it can be used to make electricity.
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The energy in sunlight can also be harnessed directly using a solar collector, which is commonly used to heat water.
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Some of the energy that reached Earth from the Sun millions of years ago is stored in fossil fuels, which must be drilled or dug out of the Earth if we are to harness it. We can release energy from this convenient store by burning the fossil fuels. Unlike sunlight, when the energy trapped in fossil fuels is released, climate-changing carbon dioxide gas is produced, along with other polluting fumes.
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We can use the energy in sunlight directly for light and warmth.
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Credits: Still Pictures
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