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HYSYDAYS<br>1st World Congress of Young Scientists on Hydrogen Energy Systems

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Evren Gunen
(United Nations Industrial Development Organization - International Centre for Hydrogen Energy Technologies) Sabri Ulker Sk. 38/4 Cevizlibag, Zeytinburnu 34015 Istanbul, Turkey

Ayfer Kale
IAHE (International Association for Hydrogen Energy) P.O. Box 248266, Coral Gables FL 33124, U.S.A.


The worldwide dependence on fossil fuels as the primary energy source has had serious consequences over recent years. Fossil fuels are also proven to be the root cause of greenhouse emissions leading to global warming. Furthermore fossil fuel reserves are finite and are being depleted rapidly as the worldwide energy demand increases with population and industrialization.

Hydrogen is an attractive alternative to replace fossil fuels. It is the least polluting fuel, when hydrogen is used the only exhaust is pure water, and it is potentially everywhere being the most common element on the earth.

Vehicle emissions account for a significant portion of greenhouse gas emissions. In this study, hydrogen and fossil fueled buses are compared, using their environmental and operating characteristics. The results of the comparison indicate that hydrogen use in buses offer great benefits over fossil fueled buses.