We know now.

我们现在已经知晓
It's why the rapa nui didn't react in time.

当地人为何没及时作出反应
It's only one of a number of theories,

这只是众多理论之一
But it has particular relevance to us today.

但今天对我们意义非凡
Since 1950, the world's population has almost tripled.

自1950年以来世界人口几乎翻了三倍
And since 1950, we have more fundamentally altered our island, the earth,

而且从1950年起我们对自已的岛屿地球
Than in all ofour 200,000-year history.

做出的根本性改变比过去二十万年都多
Nigeria is the biggest oil exporter in africa,

尼日利亚是非洲最大的石油出口国
And yet 70% ofthe population lives under the poverty line.

但70%的人口却生活于贫困线以下
The wealth is there,

财富于此
But the country's inhabitants don't have access to it.

但人民无法染指
The same is true all over the globe.

在世界各地都是如此