Oil remains the driving force

Exxon Mobil Corp. chief executive Rex Tillerson fully expects the world to switch to some form of energy other than oil.

But getting there will take at least 30 years, even if scientists come up with a breakthrough tomorrow that would make an alternative fuel financially viable.

That’s why Exxon isn’t investing in alternative fuels, though the company is funding research on biofuels and hydrogen energy, Mr. Tillerson said.

“What I know is, the day I die, I’ll probably get driven to my funeral in something that uses hydrocarbons,” Mr. Tillerson, 54, said in an interview with The Dallas Morning News.

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