Lakotan - ẹwa Calacatta ti o jẹ aami laisi ibajẹ awọn ẹdọforo eniyan. Awọn pẹlẹbẹ wa ṣafipamọ ipa wiwo iṣafihan iṣafihan lakoko aabo awọn ẹgbẹ idanileko lati awọn eewu silicosis.
