Here are the top 10 carbon sinks on the planet:

1. Oceans: The world's oceans are the largest carbon sink, absorbing an estimated 25% to 30% of anthropogenic CO2 emissions. The CO2 is absorbed through a process known as "ocean acidification," which changes the chemistry of the water and helps to reduce the amount of CO2 in the atmosphere.

2. Grasslands: Grasslands are the second-largest carbon sink on the planet, sequestering up to 30% of the carbon stored in soil. They are able to store carbon due to the deep root systems of grasses and other plants, which help to build up organic matter in the soil.

3. Forests: Forests are a significant carbon sink, absorbing an estimated 20% to 25% of anthropogenic CO2 emissions. Trees absorb CO2 through photosynthesis and store carbon in their biomass and in the soil. However, deforestation and degradation of forests have led to a reduction in their carbon storage capacity.

4. Wetlands: Wetlands, including marshes, swamps, and bogs, are another important carbon sink, sequestering carbon in their soils and biomass. They are estimated to store up to 20% of the world's terrestrial carbon.

5. Peatlands: Peatlands are a type of wetland that are particularly effective at sequestering carbon, storing up to 30% of the world's soil carbon. Peatlands are formed when dead plant matter accumulates in waterlogged soils and is slowly decomposed by microorganisms, releasing CO2 into the atmosphere.

6. Permafrost: Permafrost is soil that is permanently frozen and is found in colder regions of the world, including the Arctic and sub-Arctic. It contains large amounts of organic matter that has been frozen for thousands of years, and is estimated to store twice as much carbon as is currently in the atmosphere.

7. Agricultural soils: Agricultural soils are an important carbon sink, with the potential to store up to 10% of the world's carbon. Practices such as conservation agriculture and cover cropping can help to increase carbon storage in soils.

8. Urban forests: Urban forests, including trees in cities and suburban areas, can also be an important carbon sink. Trees absorb CO2 through photosynthesis and store carbon in their biomass and in the soil.

9. Mangroves: Mangrove forests are a type of wetland found in tropical and subtropical regions, and are particularly effective at sequestering carbon. They are estimated to store up to 10 times more carbon per hectare than terrestrial forests.

10. Seagrasses: Seagrasses are a type of marine plant that grow in shallow coastal waters, and are able to sequester large amounts of carbon in their biomass and in the sediments where they grow. They are estimated to store up to 10% of the carbon stored in the oceans.

It is important to note that these carbon sinks are all interrelated, and changes in one can affect the others. Protecting and enhancing these natural systems can play a critical role in mitigating climate change and reducing atmospheric carbon dioxide levels.