When Americans ask what energy source is most used in the United States, the answer depends on how energy is measured. The U.S. energy system is complex, spanning transportation, electricity generation, industry, and buildings. Looking across the entire economy, fossil fuels,…

If you have ever opened your electric bill and wondered why the total feels much higher than your actual energy use, the answer might not be how many kilowatt hours (kWh) you consumed. It might be something else entirely. Demand charges….