Blackstone Chairman and CEO Stephen Schwarzman said Thursday he will miss Elon Musk after the Tesla co-founder stepped down from President Donald Trump's advisory councils to protest the administration's plans to pull out of the Paris climate accord.

Musk is "really a fascinating guy," Schwarzman said in an interview on CNBC. "He's got a lot of different interests and, you know, he's a good person. And so we'll miss him."

Schwarzman, who spoke on "Squawk Box," is the head of Trump's economic advisory council.

Musk announced earlier this month that he will leave his positions on presidential councils on business, manufacturing jobs, and infrastructure following Trump's announcement that the U.S. will back out of the Paris Agreement.

Schwarzman said he understood Musk's reaction — as a maker of electric cars and solar solutions for homes and businesses — to political events but wished he would have stayed for the long haul.

"Life tends to be longer than one issue, and it's important, I think, to be involved for the long term to impact a variety of issues," he said.

Musk, founder of private space firm SpaceX, also wants to dig tunnels under cities through his new Boring Company.

Watch: A Billionaire's Bet: The Best and the Brightest on CNBC on Sunday at 10 p.m. ET/PT about the Schwarzman Scholars program in Beijing aimed at grooming future leaders.