There is little reason to conduct much of this mining extraction at all. If you look at the jobs generated, as the statistics from the UN Economic Commission for Latin America and the Caribbean suggest, you see this generates very little employment and the use value of the mining minerals that would actually be used for productive ends would be a much lower rate than if it were driven by the profitability concerns of Canadian mining companies. There would be much reduced extraction if you were interested in environmental sustainability and production of jobs for the internal market.
On September 28th, 2017. See this statement in context.