Battle over materials
The precious bounty is hauled out of the earth by giant mining equipment with wheels twice the size of an average person. With a single tire costing as much as 40,000 euros ($42,400), these monster vehicles will set a mining company back some 3 million euros. But they do pull their weight. Each one can transport up to 240 tons of rock. A full tank of gas holds 3,800 liters (1,000 gallons).