All of the electricity in the United States is produced using several natural resources. Some are nonrenewable, and some are renewable. Nuclear energy accounts for 19.9 percent of all the electricity produced in the United States, and 9.3 percent is produced using natural gas. Hydroelectric energy produces another 9.2 percent, and petroleum and other sources produce 2.3 percent. Coal is the source of energy for producing all of the rest of the electricity used in the United States. What percentage of electricity is produced by coal energy in the United States?
