1.   Liffe trades robusta-variety coffee, a coarser grade than the arabica variety traded in New York.

2.   London-traded robusta coffee beans, the less-favored siblings of the tastier New York-traded arabica variety, are suddenly in vogue.

3.   Meanwhile, worldwide demand has been rising, particularly in Europe and Asia, where more people are switching from bitter robusta beans to the richer arabica variety.

4.   Most Brazilian coffee is of the arabica variety.

5.   The country produces mainly the high quality arabica variety.