Populism and protest lurk behind Europe’s dying coal mines

Cameco shares were down 7.8% to $9.83 a share touching 52-week low mid-afternoon.

Systematic cost cutting has taken some strain off Teck's balance sheet over the last few years as metal prices have slumped.

The miner said its turnaround plan was “on track” as it slashed debt and beat earnings forecasts in the first half of the year.

CAT said commodity prices remain on the low end and had yet to translate into increased mining activity or higher demand for equipment.

The company however is still debating whether to sell or spin off its majority stake in Kumba Iron Ore Ltd, Africa's top producer of the commodity.

Most of them have been after existing operations and companies, rather than trying to build mines from scratch.

Husky Energy says its thermal oilsands project that was shut down while wildfires swept through the Fort McMurray, Alta., region in May is already back to producing bitumen at its previous level.

What killed the dinosaurs? It's a question as old as – well the dinosaurs themselves, and one that everyone from school children to scientists have been asking for decades.

It produced 86.82 million tonnes of iron ore in the April-to-June period, down 2.8% from a year earlier.