What do solar energy and fossil fuels have in common?

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Solar energy and fossil fuels provide us energy that originated from the same source, our Sun. We obtain Sun's energy in the form of light and heat energy. We convert it to useful form using man-made devices such as, solar cells and solar water heaters. A much more efficient process is employed by plants, known as photosynthesis. In this process, plants consume Sun's light energy to glucose and water molecules. The glucose is further used by plants for growth and survival. Animals, in turn, consume plants as food, for their own growth and survival. When the plants and animals die, temperature and pressure (over a period of time) convert them to fossil fuels. We use these fuels in the form of coal, petroleum, natural gas, etc. to do useful work.

Hence, solar energy and fossil fuels provide us energy obtained from the same source.

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