• How many kWh counterclockwise will our ConEd dial turn if we cover our roof with solar panels?
• How many turns of the valve can we ratchet back boiler burning, if we stick as many geothermal pumps as we can next to it in the basement?
• How long will it take to recoup our capital investments in retrofitting our house with high R-factor windows?

These are are but a few of the questions that can be answered, with proper training on green building, and a good blueprint.