"From a terrestrial standpoint, the biggest problem we need to solve on Earth this century is sustainable production and consumption of energy," Musk said during the show. "This really is quite a serious problem. People really should take this quite seriously."

We've known for a while now that we desperately need to kick our oil habit. About 90% of the transportation sector in the US is oil-dependent. We're clinging to this dwindling resource, and considering that we know it's dwindling, our behavior seems insane, Musk said.

"Why would you run this crazy experiment of changing the chemical composition of the atmosphere and oceans by adding enormous amounts of CO2 that have been buried since the pre Cambrian era?" Musks asks. "That's crazy. That is the dumbest experiment in history by far."