Listen. Number the last word or phrase in each sentence. 1. Mining is an extraction … 2. It takes raw materials from the … 3. The main materials are metals, like iron, aluminium and …
4. But another important raw material is … 5. Burning coal produces a lot of greenhouse … 6. But coal-fired power stations are still the main source of …
7. At one time, mining was very … 8. For example, in the USA, in 1911, mining led to … 9. But engineers have made the industry … 10. In 2011, only 37 miners …