Energy Use in The US By 1284892 Period: Jan 1, 1700 to Jan 1, 1960 Energy Use in The US Mar 1, 1700 Wood was burned as fuel Mar 1, 1807 First use of geothermal energy occurred Mar 1, 1885 Coal replaced wood as the predominant energy resource Mar 1, 1892 People in Boise, Idaho feel the heat of the world's first district heating system Mar 1, 1921 The US first geothermal power plant goes into operation Mar 1, 1930 1st commercial greenhouse use of geothermal energy is undertaken Mar 1, 1940 1st residential space heating begins Mar 1, 1950 Petroleum and natural gas replaced coal Mar 1, 1950 Commercial for nuclear power began Mar 1, 1960 the country's 1st large scale geothermal electricity generating plant begins operation.