"Trees in the U.S. removed more than 18 million tons of air pollution in 2010, with human health benefits valued at more than $7 billion. The benefits of tree planting Clean Air." 🌳🌲🌴🌿🍃🌱 #Repost arbordayfoundation . . #TimeForTrees #planttrees #arborday #cleanair #treeplanting #forests #urbanforest