4. What can be done to prevent mine drainage from damaging the ecosystem? Utilize at least one scholarly resource to support your suggestions.

http://scholar.google.com/scholar?q=prevent+mine+drainage&hl=en&as_sdt=0&as_vis=1&oi=scholart&sa=X&ei=ntqRVYOrN8W2-AHP9JvgAw&ved=0CBsQgQMwAA