Why is diesel fuel more expensive than regular gasoline?

because of taxes...diesel makes more polution=========

Not true....new low-sulfur and new diesel engines are cleaner and more efficient than gasoline engines.

Factors are higher demand in Europe (more than half the new cars sold in Europe are diesel), distribution (shipping refined diesel from Europe costs more, not to mention the taxes charged by the EU on that refined diesel fuel), less refineries, higher cost of refining (investing in new equipment to produce low-sulfur diesel, although less refining is technically needed), and taxes. Its safe to say 4 out of the 5 are attributed to environmentalists/Liberals.