Did you know?

The largest primary source of
electrical energy in the United States is:

        A)  uranium
        B)  petroleum
        C)  natural gas
        D)  coal

Scroll down for the answer...

D) coal
According to the U.S. Department of Energy, "Coal is one of the true measures of the energy strength of the United States. One quarter of the world's coal reserves are found within the United States, and the energy content of the nation's coal resources exceeds that of all the world's known recoverable oil. Coal is also the workhorse of the nation's electric power industry, supplying more than half the electricity consumed by Americans."