First of all, do you know what "Yin & Yang" means? That's important hereLet's start by explaining what that expression "Yin & Yang" is all about - the irony of the saying is that ENERGY is one of the words in describing what those two word means, and how it relates to Bismarck and Mandan's heating bill. Here is how en.wikipedia.org describes it "In Chinese mythology, the universe develops out of a primary chaos of primordial qi or material energy, organized into the cycles of yin and yang, force and motion leading to form and matter. The YANG of the whole thing is that now we will see our monthly bill rise. According to the Bismarck Tribune "North Dakota MDU bills are about to rise nearly $10 per month.