No, they have risen dramatically all over the globe, not just in the US. Before the Industrial Revolution, which began in earnest about 1800, the CO2 content of the atmosphere was about 280 ppm (parts per million). Today, it is many times that amount. The dramatic increase in global carbon emissions from 1800 to the present can be seen clearly in this graph:
Considering that the United States has historically been the world’s #1 consumer of fossil fuels, and its largest carbon emitter, since at least the beginning of the 20th century, there is no question that U.S. carbon emissions have been, if not the primary engine of this worldwide increase, certainly its single largest contributor.
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