U.S. energy-related CO2 emissions 1990-2019, by fuel type

Energy related carbon dioxide emissions in the United States from natural gas have noticeably increased over the past three decades. In 1990, natural gas emissions totaled just over one billion metric tons, and by 2018 had peaked at 1.7 billion metric tons. Emissions from natural gas are far lower than those emitted by coal. However, coal emissions have been falling rapidly in this past decade, and dropped to a low of 1.1 billion metric tons. This is due to coal's share in the U.S. power mix decreasing as electricity producers move away from this polluting energy source.