In this February 3, 2017 photo, Maria Avila moves her flock of sheep in Coata, a small village on the shores of Lake Titicaca in the Puno region of Peru. Avila, the mother of a 4-year-old living in an adobe house, says she cannot bathe or drink the lake's water without getting severe diarrhea or red spots on her skin. (Photo by Rodrigo Abd/AP Photo)
