If spruce or pine boards are folded in a dense pile immediately after cutting the logs, gray and green mold will appear on them

If spruce or pine boards are folded in a dense pile immediately after cutting the logs, gray and green mold will appear on them. If, however, the rows of boards in a stack are separated with slats, and gaps are left between the boards in a row, mold does not grow. Try to explain why this is happening.

If spruce or pine boards are folded in a dense pile immediately after cutting the logs, gray and green mold will appear on them. If, however, the rows of boards in a stack are separated with slats, and gaps are left between the boards in a row, mold does not grow. Try to explain why this is happening.

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