High in the Andes, a Mine Eats a 400-Year-Old City
news.nationalgeographic.com
news.nationalgeographic.com
The other problem is that although these people are "middle income" by UN standards, by any reasonable standard they're desperately, desperately poor. Which is why they stay for the mining-linked income opportunities.
Generally people are driven to the urban centers in the first place after their [sustainable] rural ways of life and systems of land management are dismantled in the name of "liberalization"/"privatization"/"modernization", leading to ecological deterioration, and ultimately resulting in complete desertification.
This process is taking place pretty much everywhere. Recently we've seen its bloody end-game in Syria: https://www.grain.org/bulletin_board/entries/5225-over-grazi...
It's critical to understand that human society takes place within a biophysical-ecological context. Ignore that and our predictions about the future are bound to be wildly inaccurate. The same can also be said about our understanding of the past.
If you wanted to live a 15th century lifestyle growing potatoes and quinoa and herding llamas and alpacas, you can still do that - people up and down the Andes still are.
Maybe I'm misreading what you said - because I don't think you could argue that people are moving from villages to cities because of privatization and land being polluted - in general. In some specific cases people are forced to move because of externalities like pollution or instability for sure - but migration to cities is just a step in social evolution that's been happening since forever - subsistence farming is a horrible way to live compared to even low level jobs in cities and people naturally want to avoid that.
After reading the article, it seems so complicated that it would take competent reconciliation between all parties, to find a solution.
But what I don't get is how this mine can extract hundreds of millions of dollars per year out of the ground and yet not be willing to scrape up the relatively small investment needed to comfortably relocate a few thousand Chilean villagers.
Mining isn't necessary a high-profit-margin business, but they really ought to consider resettlement to be a proper business expense.