Burger King is staging an intervention with its cows. The chain has rebalanced the diet of some of the cows by adding lemon grass in a bid to limit bovines contributions to climate change. By tweaking their diet, Burger King said Tuesday that it believes it can reduce a cows’ daily methane emissions by about 33%. Cows emit methane as a by-product of their digestion, and that has become a potential public relations hurdle for major burger chains. Greenhouse gas emissions from the agriculture sector made up 9.9% of total U.S. greenhouse gas emissions in 2018, according to the Environmental...