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Electricityis an essential part of modern life and important to the U.S. economy. People use electricity for lighting,heating,cooling,and refrigeration and for operating appliances,computers,electronics,machinery,and public transportation systems.

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The following pie chart (Figure 4) shows the United States’ energy consumption by source in 2019. As shown in the chart, petroleum that is mainly used for the purpose of transportation has the biggest share of 37%. Natural gas is in second place with 32% share of energy consumption. Figure 4: Energy consumption in the United States, 2019

Americans use a lot of energy in homes, in businesses, and in industry, and to travel and transport goods. There are four end-use sectors that purchase or produce energy for their own consumption and not for resale:

Natural gas is in second place with 32% share of energy consumption. Click to see a text description of Figure 4. Figure 5, below, illustrates the historical energy consumption in the United States by source.

Today, over 3% of U.S. electricity comes from solar energy in the form of solar photovoltaics (PV) and concentrating solar-thermal power (CSP). . Markets for solar energy are maturing rapidly around the country since solar electricity is now economically competitive with conventional energy sources in most states.