| 1 | Coalmining operations in the Australian state were severely hampered. | |
| 2 | Democratic Republic of the Congo has lost an estimated 300,000 mining jobs. | |
| 3 | It can be extracted without burning a fossil fuel such as coal, gas, or oil. | |
| 4 | If something falls out of the rock handler, a special bulldozer take it back to the excavating site. | |
| 5 | The Bories are rock enclosures fashioned from field-clearing limestone, and no one is quite certain how long they have been standing here or when they were first built. |