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

What kind of fuel alternative do you think would be best? Electric, hydrogen, ethanol, other?

There a few different options yet it seems that the switch is very slow. What do you think would be the best alternative and do you think it would be a possibility to offer them all to the public at once.
Thank you for the great answers so far everyone. Breath of Wind I agree with most of what you said. We might need to look into different energies for different situations.