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The Destructive Nature of Lichen on Metal Roofs, Gutters and Concrete

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What is Lichen Lichen is a slow growing plant that grows on roofs, rocks, concrete, walls and trees. Lichen grows with two other organisms, algae and fungus. They actually feed each other, or create food for each other, allowing them to grow. Lichen can be very destructive, eating away at concrete driveways, sidewalks etc and

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