Magma heated by the core rises towards the Earth'ssurface.

炙热的岩石受到地核加热提升到地球表面

As it spreads sideways,the Earth's crust is very slowlydragged apart.

随着向两边蔓延 地壳渐渐地被分离开

This moves the continents,creating the Earth's restless and ever-changing surface.

导致了板块运动 导致地球表面无休止的变化

But crucially for life,the core does more than just shape the planet.

但是这对于生命很关键 地核不仅仅是塑造了地球表面

Where these plates collide, it creates massive volcanic eruptions,

板块运动它造成了巨大的火山喷发

which release carbon dioxide into the atmosphere.

向大气层释放二氧化碳

Today, we think of carbon dioxide

如今，我们觉得二氧化碳

as a dangerous greenhouse gas that leads to global warming.

是导致全球变暖的危险的温室气体

But throughout Earth's long history, carbon dioxide has played a vital role

但是在地球漫长的历史长河中二氧化碳发挥着重要作用

in keeping our planet the right temperature for complex life to survive.

来维持我们的星球温度适宜 适合复杂生命存活