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i saw . . the milling operation that recycles and contains all processed water, and the huge [residue-collecting] pond that, over time, will become a 600-acre wetland. i saw the sophisticated monitoring system for the early detection of contamination in the groundwater. —t. h. watkins, "hard rock legacy," national geographic, march 2000

the quotation describes the management techniques of a modern gold mining operation. what is the primary purpose of these techniques?

Match your vocabulary word to its definition. 1. emigration 2. immigration 3. migration 4. overpopulation 5. sustainable development 6. under population 7. unsustainable development 8. urbanization the movement from one place to another the number of people exceeds the available natural resources in an area leaving one's homeland to settle in a new place the increase in the population of a city the movement of people to a new country the ability to meet current needs without reducing the ability to meet future needs resources being used up at a faster rate than they can be replenished birth rate insufficient to replace the existing population