A quote from Chapter Six:
"So this is the crap part of the story. No, really. It is a story of three kinds of crap. The first kind is moth crap. Mammoth crap has an interesting story on Mala-Mundial. Since most of the planet is covered in ice, the back-end deposits actually will become the earth that the moths will walk on generations from now. And it helps spread the grasses that were engineered to thrive in this sub-Siberian weather. The real problem is, there’s no flies or dung beetles to assist in that final stage of decomp. There is a saying on Mala-Mundial. In the land of the dead, nothing decays, as the saying goes. So you have to wash the dung with enzymes that remove all the bacteria and leave only dirt and grass. Consider yourself educated."