The European Commission is opening an investigation into Chinese wind-turbine suppliers operating in Spain, Greece, France, Romania and Bulgaria, competition chief Margarethe Vestager said on Tuesday. “We are launching a new inquiry into Chinese suppliers of wind turbines. We are investigating the conditions for the development of wind parks in Spain, in Greece, in France, in Romania and in Bulgaria,” Vestager told an audience in Princeton in the US state of New Jersey. The investigations concern suspicions that some operators may benefit from an unfair competitive advantage due to foreign sub…