The song is about realising something to late, for example global warming as was said before.
They are standing on a wall, laughing, and don't see what is coming. Later, the catasrtophe comes over them (global warming, a war...) and they have to pay for their blindness and their greed. In the end, they are standing where they stood before. The dynamic of the song matches the lyrics very well since they are louder when the catastrophe has come and more quiet in the end.
The song is about realising something to late, for example global warming as was said before. They are standing on a wall, laughing, and don't see what is coming. Later, the catasrtophe comes over them (global warming, a war...) and they have to pay for their blindness and their greed. In the end, they are standing where they stood before. The dynamic of the song matches the lyrics very well since they are louder when the catastrophe has come and more quiet in the end.