Opencast mining in Argentina

To Know a bit more about the effects of mining on the environment, the students of 3rd year worked with some local cases to demostrate the hypothesis "Open cast mining has caused serious environmental problems in Argentina during the last decade".
They collected information from secondary sources and prepared a google doc to process and analyse the different cases.
Take a look to one of them....
https://docs.google.com/document/d/16H3BIfs0O52YLPbPTokrudSIYh5XBeexJpepn-kl43U/edit?ts=582cf1c9