Here's a breakdown:
* Rocks (99.9%): Carbonates like limestone and dolomite hold the vast majority of Earth's carbon. They form over millions of years from the accumulation of marine organism skeletons and shells.
* Ocean (0.03%): The ocean contains dissolved carbon dioxide (CO2), which is absorbed from the atmosphere. It also holds carbon in living organisms like phytoplankton and marine animals.
* Soil (0.01%): Soil contains organic matter, which is decomposed plant and animal material, along with carbonates.
* Fossil fuels (0.001%): Fossil fuels like coal, oil, and natural gas are formed from ancient organic matter over millions of years.
* Atmosphere (0.0001%): The atmosphere contains carbon dioxide (CO2), which is a greenhouse gas and plays a vital role in regulating Earth's temperature.
* Biosphere (0.0001%): Living organisms, including plants, animals, and microbes, contain carbon.
It's important to note that while rocks hold the most carbon, it's relatively inactive. The carbon in the atmosphere, ocean, and biosphere is much more dynamic and plays a crucial role in Earth's climate system.
