The circular space in the middle of the Bosquet de la Colonnade is filled with a thick layer of moraine – granite that was ground into a fine grey powder over centuries by moving glaciers. The claylike material surrounds the sculpture of Pluto abducting Persephone, the goddess of fertility. The installation is one result of Eliasson’s ongoing dialogue with geologist Minik Rosing, who is developing plans to export moraine from Greenland to tropical and subtropical areas, where it can be used to revitalise the depleted soil, as it is a rich source of the mineral nutrients that sustain crops and other plants.