Millions of cows, pigs and chickens help to make the Netherlands an agricultural powerhouses. But the animals that contribute to €105bn in annual farm exports also generate something less desirable: alarming levels of nitrogen emissions from their waste.
数以百万计的牛、猪和鸡使荷兰成为农业强国。这些动物每年贡献了1050亿欧元的农业出口，但它们也产生了一些不那么理想的东西：它们排泄物中令人震惊的氮排放水平。
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