On Tuesday, Burger King announced that it was treating some of its cows to a new menu with a Thai twist, adding lemongrass to their feed.

It sounds like a whopper, but it’s true. The fast-food giant is in the middle of a long-term scientific experiment — how much can it reduce the amount of methane cows burp into the atmosphere by adding lemongrass to their feed?

Burger King’s restaurants will be offering the fruits of its initial labor, new “reduced methane emissions beef,” to customers in Austin, Los Angeles, Miami, New York City, and Portland, for a limited time this month. The news exploded onto the internet on Tuesday with a splashy music video starring the Walmart yodeling kid and directed by Michel Gondry.

The…