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.
"One popular strategy is to enter an emotional spiral. Could that be the right approach? We contacted several researchers who are experts in emotional spirals to ask them, but none of them were in a state to speak with us."