The Watership Down rabbits removed an additional 0.1 nanometers constructing their warren, although that was mostly soil. British rabbits have historically mined very little coal; the sole rabbit-run coal plant was shut down in the 1990s.
https://explainxkcd.com/2992/
While peat regenerates, it does so slowly, so they might actually have burned off some measurable elevation (on average)
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While peat regenerates, it does so slowly, so they might actually have burned off some measurable elevation (on average)