Where humanity's C02 comes from 91%33.4 billion metric tonnes 9%3.3 billion metric tonnes Fossil Fuels Cement 2010 Land Use Change 2010 Where humanity's C02 goes 50%18.4 billion motric lonnes 29.5 billion metric tonnes 24 8.8 billion metric tonnes Atmosphere 2010 Land 2010 Oceans 2010 2010 data updated from: Carbon Le Quere et al.2009 Nature Geoscience Canadell et al.2007,PNAS CO2Now.org