Environmental Impact of a Clean Urban Bus Fleet in the City Of Zaragoza

The aim of this paper consists is the study of the environmental impact of prototypes of electric buses in the urban transportation. The source of the power is given by a fuel cell, which produces electricity by using hydrogen as primary fuel, and implies the introduction of the most advanced clean technologies different to the traditional diesel motorizations. Clean technologies are defined as those that from production to the end of its usable life, passing by its use phase period and therefore including the recycling of parts and recovering of residues do not affect the environment.