This is the world’s first potash mine that will leave no salt tailings on the surface.

Workers at Nutrien Ltd.’s Cory potash mine in Saskatchewan have been stuck underground since Tuesday afternoon, but are safe.

The temporary decree effectively removes any involvement of the National Indigenous Affairs agency (FUNAI) in reserves demarcation.

The Milestone project will be developed as a solution mine. This will be the “newest and most innovative, environmentally friendly and capital efficient new potash mine in Canada,” says Western.

Canada's Nutrien Ltd, the world's biggest producer of potash fertilizer, said on Tuesday that it was evaluating whether to expand its annual production capacity by 5 million tonnes after 2023.