Aquatic life may be harmed by the sulfuric acid from

What is a property that is true for metallic minerals that is not true for nonmetallic?

Placer deposits are often found

Aluminum's ore is called

This type of mine uses a shear to get ore

For a mine to be considered the deposit must be how much more concentrated

Nonmetallic minerals that are prized for their beauty are

The type of mining that uses chemicals to dissolve the mineral

The collapse of pillars in mines can cause

This Act requires mines to put area back the way it was when they are done

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