Petróleo

"New drilling techniques will help ExxonMobil meet transportation’s fuel needs, which will largely rely on petroleum through 2040.

There’s been a push to wean vehicles from petroleum, but fossil fuels will continue to power the transportation field for the next few decades, according to the ExxonMobil researcher who advises the company’s corporate executives.
One is that the global population is growing rapidly, as is the number of middle-class people who have the wherewithal to purchase vehicles. That will drive up the demand for vehicles as the new middle class buys cars and businesses buy trucks to deliver goods needed by the burgeoning population. Much of this growth will come in emerging nations."
ExxonMobil predicts heavy reliance on petroleum - SAE International