In response to a steady decline in energy storage in crude oil, the European Union, international vehicle manufacturers and a number of governments across the EU are investing significantly in new technological developments that could substitute in equal amounts the demands for oil consumption in transportation.

Buses have a particular need for low emissions, because they drive high mileages in urban environments. They also have the space within the vehicle to house Hydrogen tanks, which do not increase a bus’ weight by a large percentage. Bus drivers can be trained to refuel and monitor Hydrogen systems, and buses are usually filled up at dedicated re-fuelling points where Hydrogen can be stored..

The issues of dependence on imported energy sources and of the security of that supply have been highlighted by events at home and abroad over the last few years.
Serious problem present existing oil and gas reserves for our existing technology because they include higher levels of sulphur, nitrogen and heavy metals which can not be used in existing catalytic conversion processes. Investments to develop new catalysts and processes for extractions to the above catalyst demands are costly and need new technology development. Development of new technology is timely and will not follow the raising demands of China, India and other fast developing countries.
Example comparison between the fleet of 100 diesel buses and 100 hydrogen buses will show benefits of introducing these vehicles in the public transport system in the capital city of Ljubljana in Slovenia.