Sustainability is a word that is very difficult to define as it is in constant discussion and used with multi-dimensional purposes. In the most colloquial language it is used to refer to the decisions, actions and dispositions to cover the present needs without leaving out the future generations. In other words it deals with a responsible use of resources in order to maitain them over the years. As the industrial era has passed, humans have realized that most of the resources, although renewable, are desapearing because they do not have time to finish their renovation process. Sustainability deals with the decisions that need to taken in order to assure the supply and standar of life over the next decades.
