He also had something to say about fellow billionaire Elon Musk.
When it comes to securing humanity's survival in the face of climate change, billionaire Microsoft founder Bill Gates would rather save Earth than flee from it.
Escaping to Mars, a dream goal for SpaceX CEO Elon Musk and other techno-utopian thinkers, just isn't for him, Gates said on The New York Times' podcast Sway. Instead, he argues that there's more important work to be done here on Earth, like investing in decarbonizing various industries or developing and distributing vaccines. Compared to all that, Gates simply doesn't see the appeal of traveling — or escaping — to the Red Planet.
To be fair, Gates also took time to commend Musk on the podcast, saying that what he accomplished with his electric vehicle company Tesla is "one of the greatest contributions to climate change anyone's ever made."
But he also said that tackling electric vehicles is easy compared to the work it will take to clean up other industries, and investing in rockets or Mars journeys instead of focusing on those other problems is a missed opportunity.
"We're basically not doing enough on the hard stuff: steel, cement, meat," Gates said. "And sadly, the things people think about — the electricity, passenger cars — are a third of the problem. So we have to work on the two-thirds."
When it comes to rockets, and especially rockets to Mars, Gates says he'd rather spend his money on things like vaccines or other measures to help people on Earth.
"No, I'm not a Mars person," Gates said on Sway. "I know a lot of Mars people. But, you know, I'm not subject to that."
When it comes to that cost-benefit analysis, in other words, the vaccines will win every time — and Bill Gates is a practical guy.
READ MORE: Innovation, Not Trees. How Bill Gates Plans to Save the Planet. [The New York Times]