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Drought conditions in Colorado create plague of tumbleweeds clogging roads and waterways

The infrastructure of drought-stricken Colorado is being increasingly, and dangerously, clogged by that iconic image of the American West — the drifting tumbleweed. Tumbleweeds are created when the above-ground parts of plants detach from the root and are whipped away the wind. The effect of tumbleweeds on the local environment…