Oscillating between aesthetic and documentary forms, Kaltes Tal describes the daily business of a strip mine harvesting lime. The material removed is processed and returned to nature through forest liming. This measure attempts to counteract acid rain that troubles the forest floor. A cycle like a Mobius strip – an irreversible consequence due to the mining materials in order to restore the fragile natural balance. Lime dust delicately dusts the forest floor. A white, spherical alternative world opens, questioning our ambivalent relationship to nature.