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Story summary
- The article states that electricity generation ultimately relies on solar energy.
- It explains coal, oil, and natural gas formed over millions of years from ancient plants and microorganisms that captured sunlight via photosynthesis.
- It describes hydroelectric energy as deriving from water's gravitational potential, linked to the sun's heat through the water cycle.
- The article concludes that all energy sources, despite environmental differences, trace back to solar energy.
