• Today's oversupply of diesel, thanks to rapid expansion of refining capacity and upgrading units in the Middle East, Russia and China, has suppressed the price differential between diesel and crude oil and led some ship-owners to judge that a switch to diesel for marine bunkers is the most obvious solution.

• A vehicle is referred to as an ICE vehicle when it is fueled by gasoline, diesel, compressed natural gas or bio-fuels and has no electric drive system or charging.

• Despite the richness of hydro power of the country, electric traction was not considered for the buses and instead, diesel technology was selected.