U.S. Geological Survey: Science for a Changing World - USGS visiaul identifier and link to main Web site at http://www.usgs.gov/

Graph showing trends in U.S. coal production from 1900 to 1999. Production has increased from around 250 million short tons in 1900 to more than 1,111 million tons in 1999.

Figure 1. Graph showing trends in U.S. coal production from 1900 to 1999. The rapid growth in production after 1960 is attributed to (1) abundant reserves, (2) high productivity resulting in favorable prices for coal, and (3) the large increase in demand for electricity. Data from Energy Information Administration (2000).

U.S. Department of the Interior, U.S. Geological Survey
URL: https:// pubsdata.usgs.gov /pubs/circ/c1143/html/fig1.html
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