Leading refiner SK Innovation said on Monday it held a tree planting ceremony for SK Ulsan Forest of Happiness, in celebration of the company’s 60th year anniversary on Monday. The ceremony, held in light of the company’s initiative to achieve net-zero emissions, was held in the forest fire-damaged area of Ulju. The company will be planting 180,000 wild cherry trees in 60 hectares of land there with a bud...