If development is understood in a human and social sense like quality of living, sustainability has to get another connotation and evaluated with other references.
This was the intention of United Nations creating the Index of Human Development (IDH), surpassing a economics’ and monetarist vision of the development.
To define the sustainability in relation of the future generations necessities is to be unaware of the geometric progression of the necessities of the human beings and its corresponding economic progress, provoking the dismantling of biodiversity necessary to the preservation of the ecosystem and disabling the reproduction of its resources for the future generations.
The support cannot be defined by the pure necessities human beings, but by the complex environment of the reproduction of the life in an ecosystem.
Until recently, the economists were not interested for energy subjects, because they had natural resources as free, clear and abundant. They did not need to estimate of price, considering the criteria on parameter for the recognition of the objective value of the things.
Goods like natural oil and gas were not valued, therefore they did not have a monetary quotation. They existed in abundance. Nature, not having a price, the depreciation of the environment never entered in the budgets as the depreciation of building, installations and equipment.