Source: Graph by the U.S. Energy Information Administration, based on data from CME Group, as compiled by Bloomberg L.P. Recently, prices of high-sulfur crude oils have been declining relative to low-sulfur crude oils.
If you find a dimension intereseting, we recommend you pick up one or two facts that you find intriguing and place them into your memory. That way you will have 2nd degree information about the topic if it comes up in conversation.
Accordingly, you can do the same with others as well.