The Earth has been our home and our shelter for about 4.543 million years, giving us all the components we require for life. Curiosity has driven us to develop in science, and as a result, we have produced wonderful things like buildings and machines, but we have also devastated the environment that was supplying us with the raw materials for these creations. It doesn't matter whatever energy we bet on since sooner or later, we will cross the point of no return because humans have shown to be the most deadly species of all poisoning our own environment. The only option, then, is to look for a new home among the stars.