Can New Zealand cut methane levels with cow cocktails, ‘climate-smart’ livestock?

Cows in New Zealand are getting a cocktail typically associated with hipsters in New York or London.Branded “Kowbucha”, a nod to the popular fermented drink kombucha, it’s being tested by one of the world’s biggest dairy producers, Fonterra Cooperative Group, to see if it can reduce the amount of methane burped out by the country’s 4.9 million cows.The supplement is the latest effort by the nation’s farmers to solve an increasingly pressing problem of livestock emissions as it pledges to become…