Billionaire entrepreneur John Paul DeJoria cautioned on Friday that the push toward renewable energy cannot occur overnight without serious economic consequences.

During an interview with Fox Business, the co-founder of John Paul Mitchell Systems explained that the United States used to be “totally sufficient when it comes to energy,” but is experiencing headwinds from the rapid transition toward green sources.

“No disrespect to those who want to go green. I want to go green, I wave the green flag, but you can’t do it overnight,” he explained. “You’ve got to adjust to it over time and not take a nation almost to its knees because you want to go green immediately.”

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DeJoria, who was homeless before successfully launching his hair product empire, added that the transition ought to be led by the private sector. “It’s got to be done as a business person would,” he remarked. “Here’s the oil and gas consumption, here’s what we want to do, and let’s gradually get into it.”

Read more: Daily Wire