These extremely fragile ecosystems require extremely low-impact travel. Your presence will be stressful. Open fires, which pose a huge threat to man-made structures, are prohibited. The fewest plants that can survive the harsh polar climate, including lichens and snow algaes, are protected species that don't fare well under boot soles. A footprint in polar moss, of which there are some 350 Antarctic varieties, lasts ten years.
Human waste is preserved for decades due to the aridity.
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