| 1 | We should strive to protect the world's natural resources. | |
| 2 | The natural resources in the area were extensively mined. | |
| 3 | We should protect natural resources to safeguard our planet. | |
| 4 | The daily life of mountainous residents cannot be separated from the local natural resources. | |
| 5 | The accelerated urbanization has increased people's demand for natural resources. |
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