At the conference, the representatives agreed “The Edinburgh Declaration on Reactive Nitrogen”. The document highlights the importance of reducing reactive nitrogen emissions to the environment, adding that the benefits of reducing nitrogen outweigh the costs of taking action.

　　5. The underlined word “menace” is used to express that the reactive nitrogen, largely produced by human activity can be ________.

　　A. frightening

　　B. threatening

　　C. unique

　　D. unusual

　　6. We can infer from the passage that ________.

　　A. it's harmless to have reactive nitrogen existing in the atmosphere

　　B. reactive nitrogen emissions help aggressive species less than crops

　　C. the harm to those delicate species has a negative impact on biodiversity

　　D. reactive nitrogen can fertilize soils and keep their biodiversity

　　7. The team of EU scientists released the second report of nitrogen emissions this week when ________.

　　A. no action was taken to stop nitrogen emission

　　B. governments were willing to protect areas harmed by nitrogen

　　C. “The Edinburgh Declaration on Reactive Nitrogen” was agreed

　　D. nitrogen emissions were threatening wildlife sites' biodiversity

　　8. Which of the following would be the best title for the passage?

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