I unintentionally hijacked the "How's the weather" topic so figured this might be a better place to discuss energy costs. Once I mentioned I was still burning coal, it got into a discussion of energy costs, which is definitely more economic related. Environmental costs can play into that as well.
In NH, we have about a 5 month heating season and about 2-3 weeks where we need (want) AC, so my heating costs are a much larger portion of our energy costs. I pay about $1200/season for coal, and that usually gives me excess heat from a source that doesn't rely on electricity (in the event power goes out).
Currently I'm sitting in my kitchen and it's 17F and windy and snowing out and I had to open the door to our Great Room (unheated 3.5 season space) to try to get the downstairs half of the house nearest the stove under 80F. This is pretty typical in the winter for us.
I mentioned that I use about 200 gals of oil/month in the heating season *without the coal stove), and when I bought the coal stove over 10 years ago, the price of heating oil was around $4/gal as I recall. At the time, I paid about $1000 for a seasons worth of coal to be delivered and this year it was closer to $1200, over 10 years later. With the coal stove, I burn less oil in the heating season than I do the rest of the year. My hot water is tankless off my oil burner.
Coal demand has dropped a lot so the price has stayed fairly stable. The increase in costs probably have more to do with transportation than anything else. If I lived in Pa, the same coal would be closer to half what I pay here in NH. As I mentioned in the weather topic, I am well aware of why people burned coal back in the day, and why I still do.
I live near a Waste Management transfer station and am able to re-bag and bring the coal ash there, for now.