The metals that electric cars need sit on the abyssal plain in nodules that took millions of years to grow, and a 2026 survey of a seabed disturbed decades ago finds the animals living among them have still not recovered
【1】The abyssalplain is often described as a desert, and from the deck of a research ship it looks like one: flat, dark, apparently empty.It is not empty at all, because scattered across that mud in extraordinary numbers are small black lumps called polymetallicnodules, each one a slow accumulation of iron, manganese, nickel, copper and cobalt that took millions of years to form.
【2】Those metals are precisely the ones a transition away from fossil fuels is hungry for, which is why companies and governments have spent a decade preparing to vacuum the nodules up.The problem is that the nodule is not a resource sitting on a habitat; it is the habitat.
【3】A study published this year reports what happens afterwards, and the answer is less reassuring than the industry's own assessments suggest.Researchers returned to a strip of seafloor that had been experimentally disturbed decades earlier, and compared it with untouched sediment a few hundred metres away, counting the animals living in and on the mud.
【4】The difference had not faded.Where the nodules had been removed, the burrowing fauna was still markedly poorer than in the control plots, with fewer species and a different composition, and the tracks left by the collector were still visible as bare furrows.In other words, the recovery that models had predicted was not happening.
【5】The explanation is arithmetic rather than moral.A nodule grows by a few millimetres every million years, so the structure that shelters a sponge or an anemone cannot be replaced on any human timescale, and the animals that specialise in living on nodules have nowhere else to go.
【6】There is also the sediment itself.Collecting machines lift the top layer of mud and discharge the finer fraction back into the water, where it drifts as a plume and settles over animals that filter food from the current, smothering them far beyond the area that was actually mined.The plume can travel for tens of kilometres before it settles.
【7】The industry argues that the comparison is unfair, since terrestrial mining also destroys habitat, and that the metals are needed for batteries that will displace oil.Both claims are true, and neither settles the question, because the choice is not between a mine and no mine but between two kinds of damage whose costs fall on different people and different centuries.
【8】Regulation has been slow to catch up.The International Seabed Authority, which governs the high seas, has spent years negotiating a mining code without agreeing on how much harm to the deep ocean counts as acceptable, while several countries have called for a moratorium until the science is clearer.
【9】What the study changes is not the arithmetic of the trade-off but the timescale attached to it.A decision taken to supply batteries this decade would leave a mark on the seabed that outlasts the cars, the companies and the treaties that authorised it.That is an unusual kind of cost, and it deserves an unusual degree of care.
The problem is that the nodule is not a resource sitting on a habitat; it is the habitat.
主干：The problem is that ...（主系表结构，that 引导表语从句）
分号并列：后半句 it is the habitat 与前半句的 not a resource 构成"不是 A，而是 B"的对照
现在分词：sitting on a habitat 作后置定语修饰 resource（"躺在栖息地上的资源"）
修辞：habitat 在句中重复出现，用同一个词把"资源"与"栖息地"叠合，点明矛盾的核心
考点：表语从句；分词后置定语；not A but B 的变体（分号对照）
译文：问题在于：结核并不是"躺在栖息地上的资源"；它本身就是那个栖息地。
Collecting machines lift the top layer of mud and discharge the finer fraction back into the water, where it drifts as a plume and settles over animals that filter food from the current, smothering them far beyond the area that was actually mined.
主干：Collecting machines lift ... and discharge ...（两个并列谓语）
非限制性定语从句：where it drifts ... and settles ... 修饰 the water（it 指排回水中的细颗粒）
定语从句：that filter food from the current 修饰 animals；that was actually mined 修饰 the area
现在分词作结果状语：smothering them far beyond the area ...（"从而把它们闷死"，结果是顺势发生的）
Both claims are true, and neither settles the question, because the choice is not between a mine and no mine but between two kinds of damage whose costs fall on different people and different centuries.
主干：Both claims are true, and neither settles the question（并列 + 否定词前置的倒装意味）
原因状语从句：because the choice is not between A but between B（not ... but ... 的对照）
注意：neither 本身已含否定，句子用 and 连接却表达转折，属于"让步式并列"
定语从句：whose costs fall on different people and different centuries 修饰 two kinds of damage
考点：neither 的用法；not between A but between B；whose 引导定语从句；抽象名词并列（people / centuries）
仿写题：仿照第 7 段 "The choice is not between A and B but between two kinds of damage whose costs fall on different people and different centuries."（把"二选一"改写为"两种代价的分摊问题"）的句式，就一个你熟悉的争议（如核电站、大型水坝、城市拆迁、外卖包装）写一句"重新定义选择题"的评论。
