Sacrificing nature: gold mining on indigenous lands in Oaxaca, Mexico

While international legal norms require host states to support indigenous self-determination in development, this duty is frequently ignored by states seeking aggregate economic growth. In defence, indigenous municipalities have fashioned political coalitions with neighbouring communities and international environmental groups. But external pressures and internal divisions limit their ability to act as stewards of the environment. 
http://sciencealerts.com/stories/2332204/Sacrificing_nature_gold_mining_on_indigenous_lands_in_Oaxaca_Mexico.html