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i wrote you about this but think it was on wrong question page.. i’m from nova Scotia Canada and am thinking of starting a roof cleaning business but almost all roofs here have yellow lichens.. they are around the top of roof. Will this kill them and remove them.. I would really appreciate your help… any help would be great.. wish it was moss but most are the yellow lichen.. we live close to ocean.. do not know if that is reason.. thanks immensely
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