Chinese researchers say overuse of nitrogen fertiliser is poisoning the country's air, soil and water, and that farmers could reduce its use without compromising crop yields, Nature reports.
据《自然》杂志报援引中国研究者报道，过度使用氮肥会致使中国的空气，土壤及河流受到污染，而农民减少使用化肥并不会影响到粮食产量。
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