In 2015, Norfolk Southern completed a five-year community partnership to reforest 10,000 acres in the Mississippi Delta, a “Trees and Trains” initiative to mitigate carbon emissions the natural way. Partnering with GreenTrees, a reforestation program, NS invested $5.6 million to plant more than 6 million cottonwood and native hardwood trees on land cleared for farming years ago but that had become marginally productive as cropland.