Matching Pairs Carbon storesOnline version Sizes of Carbon Stores by Raphael Heath 1 Fossil fuels 2 Atmosphere 3 Plants on land 4 Surface Ocean 5 Plants in oceans 6 sedimentary rocks 7 Soils 8 Intermediate and deep oceans 9 Earth's crust 1,500 Pg 725 - 970 Pg 1,000,000 Pg 100,000,000 Pg 3 Pg 5,000 to 10,000 Pg 750 Pg 38,000 Pg 560 to 610 Pg