The U.S. Navy boasts that’s it’s well on its way to creating a “Great Green Fleet” powered by biofuels.

But a recently retired Navy captain is making waves of his own, saying the project is a complete waste of taxpayer money and that politics is trumping national security.

“I don’t want to see us throwing away billions of dollars, and we’re doing it in a vain pursuit of something that is indefensible,” said Todd “Ike” Kiefer, an Annapolis graduate who majored in physics. He’s a 25-year Navy pilot with a master’s degree in strategy from the U.S. Army Command and General Staff College.