There are more people alive now

现在全世界活着的人
than have died in all of human history.

比史上所有死去的人还要多
But the number of dead people is increasing.

而人们还在不断死去
One day, there isn't going to be any room to bury anyone anymore.

总有一天再没有土地可以用来埋葬死人
So, what about skyscrapers for dead people that were built down?

那么在地底建起摩天坟墓怎么样呢
They could be underneath the skyscrapers

把坟墓建在摩天大楼底下
for living people that are built up.

建在活人脚下
You could bury people 100 floors down...

把人葬在一百层的地下
...and a whole dead world could be underneath the living one.

在活人脚下筑起死者的世界