Their dung is a sort of fertilizer for aquatic life.

河马的粪便是水生生物的一种肥料。

We've been using these fertilizers for decades to feed billions of people.

现在我们已经使用化肥几十年了，养育了数亿人。

The tensions between Russia and Ukraine are disrupting the global supply chain for fertilizer.

俄罗斯和乌克兰之间的紧张局势扰乱了全球化肥的供应链。

We're harvesting our kelp forests for fertilizer, which removes a key part of our coastal ecosystem.

人类正在收割海藻来制作肥料，这导致了沿海生态系统一个关键部分的缺失。

It gets used about two-thirds for fertilizer.

大约三分之二被用作肥料。

The nations themselves also collected bison bones to sell for fertilizer.

这些国家自己也收集野牛骨头来出售作为肥料。

No pesticides. Just dry seaweed for fertilizer.

没用过杀虫剂 只用了些海草当肥料。

And the government has studied the soil across Ethiopia and recommends just the right mix of fertilizer for each district.

政府对埃塞俄比亚各地的土壤进行了研究，并为每个地区推荐了正确的肥料组合。

Unfortunately, most of the artifacts were taken by explorers or treasure hunters or simply destroyed when the cave was briefly used for mining bat guano for fertilizer.

不幸的是，多数手工艺品或被探险者、寻宝者拿走。或是在这个洞穴被短暂用作蝙蝠粪肥产地时被破坏。

Indigenous cultures in the area had been using the guano on these islands as a source of fertilizer for hundreds of years, so von Humboldt definitely didn't discover guano.

这里的本土居民利用岛上的海鸟粪作肥料的习俗已经持续几百年了，因此冯·洪堡并不是鸟粪的发现者。

For example, how many news articles have been written about nitrogen fixation, the process by which plants can be made to fix their own nitrogen, thus reducing the need for fertilizer?

例如， 关于固氮作用的新闻文章有多少，植物可以通过该过程固定自身的氮，从而减少对肥料的需求？