Sustainability, this is the most used word when we want to define a form of both economic development of cities and of all humanity, which will not endanger the existence of future generations, so that they can continue to develop but is consistent with observance of ecosystems, while maintaining an acceptable environmental balance.

If you want to achieve this result, important both for us and for our children, who will be confronted with growing energy needs and progress, we need to revise many of our habits, abandoning certain forms of waste and pollution, for sources clean and renewable energy, such as the abandonment of fossil fuels, by pursuing the path of electric cars or other innovative forms of locomotion, such as hydrogen.

Other alternative sources of energy can be that of the wind, the sun and the sea, capable of producing unlimited quantities of clean energy and not polluting.