Less windy Whoppers? Low-methane Burger King still involves some hot air

Lemongrass-fed cows mean more sustainable burgers, says the fast-food chain - but experts say there's more work to be doneWhether showing off how their burgers mould due to lack of preservatives, making vegan Impossible Whoppers available across the US, or most recently using a whimsical, flatulence-focused commercial to tout new low-methane patties, Burger King's effort to remake itself as the conscious consumer's fast food of choice is in full swing.Meat produced from livestock is a significant source of methane emissions and contributor to climate change, and Burger King think they can cut those emissions by changing what the cows are given to eat.But the latest addition to the environmentally friendly menu might have been announced too soon. Researchers and experts on animal feeding and climate impact say the science is promising, but not yet strong, on Burger King's feed additive of choice: lemongrass. Related: Burger King's new plant-based burger is not suitable for vegans Continue reading...