Until the early 1800s, Americans burned very little coal. The country was thickly forested, and wood was cheap. Most houses had one or more wood fireplaces. The country didn’t have many factories that required serious energy, and coal was a niche fuel used, for example, by blacksmiths who needed high heat for their work. Report an ad

But as cities grew rapidly and demanded ever more fuel, choppers quickly deforested surrounding areas. Firewood became scarce and expensive. By 1744, Benjamin Franklin was bemoaning the plight of his fellow Philadelphians: “Wood, our common Fewel, which within these 100 Years might be had at every Man’s Door, must now be fetch’d near 100 Miles to some towns, and makes a very considerable Article in the Expence of Families,” he wrote. Johann David Schoepf, a German physician and botanist who traveled through America during and after the Revolutionary War, fretted that all this wood-burning would not “leave for [American] grandchildren a bit of wood over which to hang the tea-kettle.