Carnivorous plants are so finely tuned to low levels of nitrogen that this extra fertilizer is overloading their systems, and they eventually burn themselves out and die.

肉食性植物能很好地适应低浓度氮，因此这些额外的肥料会使它们的系统负担过重，最终它们会被压垮并死亡。

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Nitrogen is removed from the air, enabling the fuel to burn in pure oxygen.

氮气从空气中被去除，使得燃料能够在纯氧中燃烧。

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Existing technology can remove nitrogen oxides when fossil fuels burn, at a cost.

对于矿物燃料燃烧时氮氧化物的清除，在科技上和成本上都是可行的。

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Power plants that burn coal produce more than 90 times as much sulfur dioxide, five times as much nitrogen oxide and twice as much carbon dioxide as those that run on natural gas, according to the Government Accountability Office, the regulatory arm of Congress.

MSN: Coal producers find themselves in a hard place