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^th and 75^th 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 20124aa93bb8-c0d0-4735-83c2-988b43ae88f0 and CCSP 2007d980c73d-d2ba-47cb-b6d7-03e0c30f2ed9).