BRUSSELS — The EU should weaken its green car rules in an upcoming policy announcement or else risk sending the industry into a tailspin, Stellantis Chair John Elkann warned in an interview with POLITICO. "It's a tipping point. We have this moment where growth can be a choice, which is what has been decided in different parts of the world, or we accelerate the decline," Elkann said. Elkann, heir to the Italian Agnelli family which is a leading shareholder in Stellantis and Ferrari, is joining