- What are the three groups of sources for energy in the US.
- What are the three groups of end uses for energy in the US.
- What are the approximate splits between these?
- Given the energy density plot, what is an implication for choosing batteries versus hydrocarbons for powering airplanes?
- What are four types of pollutants emitted from combustion processes?
- When was the Clean Air Act Enacted?
- Why is sulfur removed from petroleum and natural gas prior to combustion, but not coal?