Reply #15: Petroleum in the general sense. That which causes global warming.

[Gregorian]

Coal, natural gas. And in that respect, it's nearly half of our energy production. The emphasis needs to be in areas other than the car. The electric car is refined, except for the battery. Storage and generation are the two big ones. It's going to be interesting to see how we can manufacture and do heavy transport without using petroleum.

I'm not optimistic. Things are going downhill quickly. On both ends. Number of users, and increases in evidence of environmental damage.