Argentina's biggest car maker, Renault, is to halve the workday for 1,300 workers, preventing firings as sales stall in a flagging economy, Bloomberg News reported. Renault and its mechanics union agreed on the plan for the Cordoba plant, which will cut production by 47 percent to about 170 cars a day, Omar Dragun, general secretary of the Cordoba branch of the mechanics union, told the news organisation.