GNT has achieved a 22 percent reduction in carbon intensity at its Exberry factories since 2020, the company’s latest sustainability report shows. GNT has achieved a 22 percent reduction in carbon intensity at its Exberry factories since 2020, the company’s latest sustainability report shows. GNT has achieved a 22 percent reduction in carbon intensity at its Exberry factories since 2020, the company’s latest sustainability report shows.