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Invasive Species
Invasive trees sprout from Baltimore buildings
Invasive trees sprout from Baltimore buildings

Pastor Elbert Street noticed a small crack in the wall behind the pulpit at Grace Christian Baptist Church. It widened. Then a branch appeared. A cluster of leaves unfurled. That was when Street realized that something was growing between the walls of his East Baltimore church: an 8-foot-tall tree. The 79-year-old pastor and others took the wall apart, hacked down the tree and hauled away bags of branches and roots. The tree came back. They cut it down again. And then again. A contractor estimated it would cost $5,000 to remove the tree and fix the walls — money the church didn't have. Now, three years later, leafy branches jut from the bricks at the rear of the...