| the united states | 0.61 |
| australia | 0.59 |
| brazil | 0.55 |
| china | 0.55 |
| canada | 0.53 |
| mexico | 0.52 |
| russia | 0.51 |
| south africa | 0.50 |
| africa | 0.50 |
| afghanistan | 0.50 |
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| produce gold | 0.75 |
| produce coal | 0.64 |
| extract ore | 0.55 |
| produce mercury | 0.48 |
| process plant | 0.45 |
| produce bauxite | 0.42 |
| remain closed | 0.41 |
| collect water | 0.41 |
| produce tungsten | 0.38 |
| operate at loss | 0.35 |
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| silver | 0.31 |
| some sort of equipment | 0.29 |
| primary crusher | 0.25 |
| turquoise | 0.25 |
| pockets of methane | 0.16 |
| worker | 0.31 |
| open | 0.65 |
| old | 0.60 |
| small | 0.59 |
| active | 0.54 |
| operational | 0.54 |
| dangerous | 0.52 |
| rich | 0.51 |
| profitable | 0.49 |
| underground | 0.49 |
| large | 0.49 |
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| situation | 0.29 |
| an ambitious plan | 0.25 |
| a segment | 0.25 |