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Humans get energy from the following sources:

  • Fossil fuels (wood, coal, oil, natural gas, biomass)
  • Geothermal energy
  • Nuclear fission
  • Solar energy (solar thermal, photovoltaic and photoelectrochemical)
  • Hydroelectric power (dams, tides, waves)
  • Wind energy

The very large majority of the world's energy (~80%) comes from fossil fuels, about 10% is nuclear, ~6% is non-sustainable biomass, and the remainder a mixture of renewable sources (geothermal, wind, solar, etc). Another possible source of energy is nuclear fusion (which is the sun's source of energy and also what is used in a hydrogen bomb), but humans have not yet developed the technology to safely use nuclear fusion as a source of energy to use productively. We might see fusion as an energy source in the next 50 years or so, but not much sooner than that!

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10y ago

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