The world needs a new source of energy, an unspillable source.

Which of the alternatives or other alternative would provide the greatest impact on the shift from fossil fuel?

In the next ten years, how much is the Contributions of the Alternatives such as
Solar – direct conversion to electricity
Solar – indirect conversion to electricity
Solar – conversion of water to hydrogen
Biofuels – alternative to petroleum-based fuels
Fuel Cells
Wind – conversion to electricity
Geothermal
Tides
well, there is a situation to replace fossil fuel due to its depletion and it will run out in the next century if we continue to use fossil fuel for all our needs. So we need to look for the effective alternatives to save the future world by preventing the extinction of fossil fuels. Solar energy, wind energy and bio fuels will contribute more than other alternatives. But the question is which contributes more than others. I guess wind power or bio fuels. but the tie up is between wind power and bio fuels. can anyone guess one of them with proof?