In the 1930s, the Dust Bowl devastated America but Franklin D. Roosevelt's massive tree-planting project is still protecting US farmland nearly 90 years later

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The Dust Bowl is one of the worst environmental disasters in American history, but it also sparked one of the country's largest conservation efforts. Nearly 90 years after Franklin D. Roosevelt launched a massive tree-planting campaign across the Great Plains, many of those shelterbelts still stand, protecting farmland and supporting wildlife