_:genid1 "Free to use with credit to the original figure source."^^ . "us-carbon-sources-and-sinks-from-1991-to-2000-and-2001-to-2010" . "15.6"^^ . "U.S. Carbon Sources and Sinks from 1991 to 2000 and 2001 to 2010"^^ . "EPA 2012 and CCSP 2007"^^ . "Changes in CO2 emissions and land-based sinks in two recent decades, showing among-year variation (vertical lines: minimum and maximum estimates among years; boxes: 25 and 75 quartiles; horizontal line: median). Total CO2 emissions, as well as total CO2 emissions from fossil fuels, have risen; land-based carbon sinks have increased slightly, but at a much slower pace. (Data from EPA 2012 and CCSP 2007)."^^ . _:genid1 . . . . . . . . . .