How much coal reserves does Indiana have for future generations? The Indiana Geological Survey has the answer at http://igs.indiana.edu/coal/.
How does coal stack up in regard to affordability? See the attached graph from the Indiana Office of Energy Development for a comparison?
Take a look in this Indiana Office of Energy Development graph at how emissions from coal fueled power plants have improved over the past 25 years.
What is the future outlook for coal mining in the countries Interior, of which Indiana is a part of. This graph from the Energy Information Administration provides a look forward.