"When the time has come when there is technologies available for mining companies to
cleanup their environmental contamination at a profit. ..."
I believe that not only that, but also, as you write, a certain amount of pressure must be exerted by the authorities, pressure to avoid further environmental damage, pressure, possibly with subsidies as a lure, to clean up contaminated sites where necessary. The increasingly expensive and problematic extraction of sands is playing an ever greater role in financial considerations!
I see this as an immense opportunity that needs to be utilised!
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