Renewable energy seems like a slam dunk, right? Governments around the world have adopted aggressive goals to reduce carbon emissions. High gas prices have made electric vehicles more attractive to many Americans. Meanwhile, the costs of wind and solar have come down so much that they're a cheaper alternative for energy production than fossil fuels.

Despite these trends, Warren Buffett's recent investing activity could lead one to conclude that he's not convinced about this supposed slam dunk. Is Buffett betting against renewable energy?

There's no question that Buffett has become a big fan of Big Oil lately. Chevron (NYSE: CVX) now ranks as the fifth-largest holding in Berkshire Hathaway's (NYSE: BRK.A) (NYSE: BRK.B) portfolio. Buffett didn't begin building a position in the oil stock until late 2020. 

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Source Fool.com