In fact, a quarter of our planet’s biodiversity is made up of soil organisms in the ground.

事实上，地球上四分之一的生物多样性 是由地下的土壤生物组成的。

And even though composting is all about getting friendly soil organisms to break stuff down for us, we don't want them to get too excited.

尽管堆肥是为让土壤微生物来帮我们分解物质，但我们并不希望它们太活跃。