| 1 | Experiments show that the adsorption capacity of lignite is low. | |
| 2 | The result show that the organic affinity of trace elements in brown coal is higher. | |
| 3 | Mines in the area supply lignite or "brown coal" for power. The electric company in the town is owned by the state. | |
| 4 | We recognise that wind and solar are playing a growing role, but brown coal remains the basis of prosperity. | |
| 5 | Natural Resources: coal, sulfur, copper, natural gas, silver, lead, salt, zinc, magnesite, lignite, crude oil. |
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