What is a Carbon Sink and How Can It Be Used in Climate Action?
A carbon sink is anything that captures and stores carbon dioxide (CO₂) from the atmosphere for an extended period. Carbon sinks are crucial in slowing down climate change, as rising CO₂ levels contribute to global warming.
How Does a Carbon Sink Work?
Carbon sinks function by absorbing and storing CO₂ in a stable form. Natural carbon sinks include forests, oceans, and soils, which bind carbon through photosynthesis and biological processes.
Forests & Plants – Absorb CO₂ through photosynthesis and store it in biomass (trees, roots, soil). When plants die, carbon is either released back into the atmosphere or stored in the soil.
Biochar as a Long-Term Carbon Sink – Biomass can be converted into biochar through pyrolysis, a process that locks carbon in a stable form. When mixed into soil, biochar can store carbon for hundreds to thousands of years, acting as a man-made carbon sink with multiple environmental benefits.
The Role of Carbon Sinks in Climate Action
To achieve global climate targets, we must not only reduce emissions but also actively remove CO₂ from the atmosphere. Carbon sinks play a key role in this process by:
- Offsetting emissions – Companies and countries can use carbon sinks to balance their CO₂ emissions.
- Improving soil health – Biochar in soil increases fertility and water retention, while also storing carbon long-term.
- Enhancing biodiversity – Tree planting and regenerative agriculture create both carbon sinks and healthier ecosystems.
Expanding and utilizing carbon sinks at scale is one of the most effective strategies to fight climate change and build a more sustainable future. With innovative solutions like biochar, we can turn carbon storage into an opportunity for both climate action and environmental restoration.