Ammonia has been proposed as a shipping fuel, yet potential adverse side-effects are poorly understood. We argue that if nitrogen releases from ammonia are not tightly controlled, the scale of the demands of maritime transport are such that the global nitrogen cycle could be substantially altered.

中文翻译：

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使用氨作为运输燃料可能会扰乱氮循环

氨已被提议作为运输燃料，但对潜在的不利副作用了解甚少。我们认为，如果不严格控制氨中的氮释放，海上运输的需求规模就会大大改变全球氮循环。