Which step(s)in rare earth mining generate(s)waste?

Question

Quizplus · Accepted Answer

All of the steps in rare earth mining listed generate waste. Digging out ore involves removal of large amounts of rock and soil, which can create overburden waste. Purification using chemical and physical separation techniques produces waste materials such as solvents, acids and tailings. Smelting produces large volumes of emissions, by-products and waste gases which can cause pollution problems. Crushing and grinding rock to a fine powder produces waste rock that must be disposed of.

Which Step(s)in Rare Earth Mining Generate(s)waste