The growing popularity of newly launched full-sized hybrid cars with high-end amenities and good fuel economy increased sales of overall hybrid cars last month in South Korea, industry sources said Tuesday. Combined sales of hybrid cars made by Hyundai Motor Co. and Kia Motors Corp. hit 2,982 units last month, up almost two-fold from 1,507 vehicles sold a year earlier, the sources said. The numbers are not as high as the record 3,511 hybrid cars sold by the two companies in December 2012, yet they represent a solid rebound in sales.