Miller's research finds that, in 2007 and 2008, U.S. emissions of methane from human - related sources were 33.4 teragrams of carbon equivalent per year. (scientificamerican.com)
In fact, the following CDIAC report estimated that in the US from the late 1800s to the present (when prosperity was generally on the rise), changes in land use have reduced the carbon flux from land to atmosphere by hundreds of teragrams per year: / / cdiac.ornl.gov / trends / landuse / houghton / houghton.html (dotearth.blogs.nytimes.com)
Annual CO2 emissions in teragrams (1m tonnes) of forest fires (dark green) and deforestation (light green) in the Amazon from 2003 to 2015. (carbonbrief.org)