They already have government oversight. They already have a plan for minimizing pollution, which is wasted material that could be mined and therefore lost money. They come from a western country with a decent environmental track record.

It doesn't seem intellectually honest to compare 1 company mining in a situation where polluting is economically disadvantageous and has the science to understand at least some of the risks to climate change.

With climate change we built several giant industries cars, power, and others that burned huge amount of fossil fuels before we knew the risks. And generally polluting is economically advantageous.