They contain more than all the Earth's atmosphere.

它们碳份量比大气都多。

Our current use of carbon fuels is a good example of that.

我们目前使用碳燃料就是这方面一个好例子。

This, they hope, will reduce carbon gases entering the atmosphere.

他们还希望借此可以减少进入大气层碳气体排放量。

That's more than twice the amount of carbon held by all the trees on Earth.

这是地球所有树所碳量两倍多。

Instead, a study published in 2021 in the journal Nature suggests it is now turning into a source of carbon gasses.

相反，2021年发表在《自然》杂一项研究表明，它现在正变成碳气体来源。

For one, there could be some kind of carbon-containing sediment deep within the Earth's mantle, that never saw the light of day.

一是，地幔深处有某些从未面世碳沉积物。

Then, they use high pressure and temperature tools to turn carbon atoms, usually from a carbon-containing gas, into layers of diamond.

然后他们通过高温高压使来源于碳气体中碳原子在基底沉积为钻石。

So much so that when we explore other planets the first thing we look for is compounds that contain carbon.

以至于当我们探索其他行星时， 我们首先要寻找是碳化合物。

Those materials are very bad to impact into, because when you vaporize and distribute the vapor from those particular rocks, you turn the carbonate-containing limestone into greenhouse warming CO2, carbon dioxide.

那些物质在撞击时非常危险，因为那些特殊石头会被汽化蒸发并且散播到全世界，这就把碳石灰石变成了温室气体，二氧化碳。

There are other issues to consider when mixing trees with buildings too — such as the embodied carbon of the steel used in reinforcement or building superstructures and the increased demands placed on maintenance.

在将树与建筑物结合时，还需要考虑其他问题，例如钢筋或建筑部结构中使用钢材碳量，以及对维护要求增加。