Currently, between 80 percent and 85 percent of our energy comes from fossil fuels. Solar energy is most likely to replace these fossil fuels, since sunlight is not only the most plentiful energy resource on earth, it is also one of the most versatile, converting readily to electricity, fuel and heat.
It’s generally acknowledged that no single renewable energy source will be able to provide for all of our energy, certainly not for the forseeable future. Each source has its problems – solar and wind are intermittent and limited in some places, for example. A mix of these energies will be needed to replace fossil fuels. I agree with raspberry that solar will be the most dominant, especially since solar panel efficiency keeps rising. I also expect wind to play a large role. Geothermal, hydroelectric, and biofuels will be smaller but still significant pieces of the puzzle.
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