Since time immemorial the human thought that the world around him was almost an everlasting source of prosperity. Even in ancient times people were fully exploiting the natural resources.

Nowadays every our move, action or inaction is the result of the various processing stations of primary energy to the secondary. All this for that in the morning we could make coffee, drive to work, watch TV, etc.

The main key to sustainable development is the realization that we are all citizens of one earth, dependent on common resources and on one another.