This week, 2013 CNN Hero of the Year Chad Pregracke reached a major milestone when his organization, Living Lands and Waters planted its ONE MILLIONTH TREE. His tree planting campaign grew out of his nonprofit’s major mission – cleaning up the nation’s waterways, especially the #MississippiRiver. Find out where that one millionth tree was planted at CNNHeroes.com – and while you’re there, nominate someone you think you should be a 2016 CNN Hero. | CNN Heroes