Over centuries, the Changpas have survived in Ladakh with their flocks of sheep, goats, yaks and horses horses in a delicate balance with nature, forever careful of its scarce resource: pastures. This very system is under strain today, as a variety of reasons have led to the shrinking of Ladakh's pastures.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/where-have-all-pastures-gone
[2] http://admin.indiaenvironmentportal.org.in/category/author/tashi-morup
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/deccan-herald-bangalore
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ladakh-plateau
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/animal-care