Sustainability. It is an interesting term but somehow outworn.

We all know what we should strive for, to live with and not against  nature, to sustain "spaceship earth".

In fact, we do not know how to do this right. The issue is, we do not oversee our actions and we are adicted to an ever increasing comfort.

In the sense of Einsein, there is now end to human stupidity. Fracking is one example. If we coudl ask the future generation whether we should carry on wasting fossile energy - the answer is obvious. 

Personally, I do not believe that there is a sustainable future in the silcon-valley power. Should we live on trees or caves then? - Depends.