think it has to do with the ability to use whatever source as an energy. We couldn't transfer trees, for example, into energy as efficiently (in terms of extraction, use, etc.) as oil. Its cheaper and easy to find.
Why make things harder and more expensive than they need to be? I don't want to pay more for that. Do you? Non_renewable energy, nuclear, electrical, mechanical or what forms of energy ?? In mass-populated countries, where electrical energy is insufficient, ways and means have resurrected. Nuclear energy, where the output to input ratio is high, as compared to hydro, mechanical or other means. Why is it used. Try a reconditioned battery to a new one. Or a new technolgy to the old. Progress is eminent.We go for newer, better ideas. That's human kind....
Dont bother about the source. there's Russia, North Korea, Pakistan, CNN News provides it, not me.......
Know why 0 answers,
Disclaimer: no prejudice or other intentions legal or non legal, diplomatic and non-diplomatic, etc....................