Burger King’s Whopper is going on a diet.

The fast-food chain announced Tuesday it’s putting cows on a low-methane diet to do its part to combat a greenhouse gas emitted from livestock that impacts climate change.

The Restaurant Brands International-owned food chain teamed up with scientists from the Autonomous University at the State of Mexico and the University of California, Berkeley to develop a formula for a new diet adding 100 grams of lemongrass leaves to the cows’ daily diet. The added ingredient was said to help them release less methane as they digest their food.

Cows release methane, a greenhouse gas that traps the sun’s heat and warms the plant as a by-product of digestion, and it significantly impacts climate change. Indeed, livestock accounts for 14.5 percent of global greenhouse gas emissions, according to the United Nations’ Food and Agriculture Organization.

BK said the diets reduced a cow’s daily methane emissions by up to 33 percent in the last three to four months. The “Reduced Methane Emissions Beef Whopper,” as its called, will be on sale while supplies last at five restaurants in New York, Los Angeles, Miami, Austin, Portland and Oregon, the chain said. Read Fox Business article

First, it was the “perfect burger,” or actually it was the Impossible Burger launched recently from Burger King. Now, their efforts have shifted from the plant-based burger to the putting the cow on a plant-based diet!

In case you haven’t heard, the climate control groups have a major problem with all the cows passing gas, to put it politely. So, the answer is now to put the cows on a plant-based diet. Wait, I thought all cows were meatless already! Well, cows don’t eat meat obviously, but the research shows that by adding lemon grass to the cows diet, the methane gas output is reduced by 33 percent.

Not that the Impossible Burger is being scrapped (as I first thought), but this is just another step in the strategy for Burger King and its national partner, Impossible Foods, to reach their “mission to eliminate animal products in the next 15 years,” says the Fox Business article.

Hey, at least we get to keep the Whopper for a few more years.