In fact, he said he was “rather ridiculed for so long” because of his beliefs.

“I was accused of being anti-science,” Charles said (viaYahoo!

“It wasn’t much fun, as it’s possible for you to imagine.”

Prince Charles looking to the side

“Why do you think I’ve done this for all these years?

Because I’ve minded about and always have done the next generations,” Charles explained.

One, in particular, has really gotten people talking!

Prince Charles driving Aston Martin

“It runs on can you believe this surplus English white wine and whey from the cheese process.”

He insisted on making the change even after the car company’s engineers told him not to.

Charles also had the royal train converted to run on used cooking oil.

“It was difficult,” he toldAston Martin Magazine.