sentences:  The effect of global warming will no doubt accelerate the changing of the Amazon's source water.Very few people have visited the headwaters of the Carhuasanta.A walking track called the Apacheta Trail, used by locals, runs across the continental divide 13 kilometers to the west of Mismi, linking the villages of the Colca Canyon to the isolated valleys of the altiplano used by alpaca herders and their families, and to the mining town of Caylloma, 60 km distant (which can be accessed by a road from another direction).