This article discusses the potential of biochar as a sustainable solution to mitigate global climate change. Biochar, a carbon-rich material produced by pyrolysis of biomass, can sequester carbon in soils, reduce greenhouse gas emissions, and enhance agricultural productivity. The study estimates that biochar could reduce annual net emissions of CO₂, methane, and nitrous oxide by up to 1.8 Pg CO₂-C equivalent per year, or 12% of current anthropogenic emissions, and over a century, by 130 Pg CO₂-C equivalent, without endangering food security, habitat, or soil conservation. Biochar has greater climate-mitigation potential than burning the same biomass for energy, except when fertile soils are amended and coal is the fuel being offset. Biochar production can be scaled from large industrial facilities to individual farms, and it can be produced from biomass waste. It offers co-benefits such as renewable energy, improved agricultural productivity, reduced nutrient loss, and enhanced soil water-holding capacity. The study highlights that biochar's climate-mitigation potential is greater than bioenergy in most situations, especially in less fertile soils. However, bioenergy is more effective in high-fertility soils where coal is the offset fuel. The study also considers the sustainability of biochar production, emphasizing the need to avoid land clearance for biomass feedstock and to use modern, low-emission pyrolysis technology. The analysis shows that sustainable biochar production can offset up to 12% of current anthropogenic CO₂-C equivalent emissions, with a cumulative offset of 130 Pg CO₂-C equivalent over a century. The study also compares biochar with bioenergy, finding that biochar has a greater climate-mitigation potential in most scenarios, especially in less fertile soils. The study concludes that sustainable biochar production has the technical potential to make a substantial contribution to mitigating climate change, while preserving biodiversity, ecosystem stability, and food security.This article discusses the potential of biochar as a sustainable solution to mitigate global climate change. Biochar, a carbon-rich material produced by pyrolysis of biomass, can sequester carbon in soils, reduce greenhouse gas emissions, and enhance agricultural productivity. The study estimates that biochar could reduce annual net emissions of CO₂, methane, and nitrous oxide by up to 1.8 Pg CO₂-C equivalent per year, or 12% of current anthropogenic emissions, and over a century, by 130 Pg CO₂-C equivalent, without endangering food security, habitat, or soil conservation. Biochar has greater climate-mitigation potential than burning the same biomass for energy, except when fertile soils are amended and coal is the fuel being offset. Biochar production can be scaled from large industrial facilities to individual farms, and it can be produced from biomass waste. It offers co-benefits such as renewable energy, improved agricultural productivity, reduced nutrient loss, and enhanced soil water-holding capacity. The study highlights that biochar's climate-mitigation potential is greater than bioenergy in most situations, especially in less fertile soils. However, bioenergy is more effective in high-fertility soils where coal is the offset fuel. The study also considers the sustainability of biochar production, emphasizing the need to avoid land clearance for biomass feedstock and to use modern, low-emission pyrolysis technology. The analysis shows that sustainable biochar production can offset up to 12% of current anthropogenic CO₂-C equivalent emissions, with a cumulative offset of 130 Pg CO₂-C equivalent over a century. The study also compares biochar with bioenergy, finding that biochar has a greater climate-mitigation potential in most scenarios, especially in less fertile soils. The study concludes that sustainable biochar production has the technical potential to make a substantial contribution to mitigating climate change, while preserving biodiversity, ecosystem stability, and food security.