The (7) dam on the Colorado river in the USA provides (8) for the city of Las Vegas. Hydroelectric power is (9), needs no (10) and produces no (11). However, the dams are (12) to build and you need to (13) a large area to create the lake, with environmental consequences.
Answer (1)
7. Hoover 8. electricity9. renewable10. fuel11. pollution12. expensive 13. flood
