No Dickensian insights are necessary to appreciate the scale of human intervention in the nitrogen cycle.

在理解人类对氮循环的干扰力度方面，并非是杞人忧天。

There would be nowhere near as many people doing all sorts of other things to the planet if humans had not sped the nitrogen cycle up.

如果人类没有加速氮循环的速度，那么就远不会有众多人对地球上做其他的各种事情。

It is also worth noting that unlike many of humanity's other effects on the planet, the remaking of the nitrogen cycle was deliberate.

还值得注意的是，与地球上其他人类的影响不同，对于氮循环的再改造是故意的。

So too is the nitrogen cycle, which converts pure nitrogen from the air into useful chemicals, and which mankind has helped speed up by over 150%.

氮循环也一样，它将空气中的纯氮转化成有用的化合物，而人类使其加速了150%以上。

What seems certain is that the nitrogen cycle is changing faster and more profoundly than the carbon cycle, which has attracted much more attention.

显而易见的是，「氮循环」比「碳循环」更可怕，变迁得更快，影响也更广泛，不过大家比较关心的却还是「碳循环」。