The storage of animal manure is a pressing issue in farming since it significantly contributes to greenhouse gas (GHG) emissions and global warming. Barns produce a lot of carbon emissions, which harms the environment. This study aims to find out whether biochar may lower the CO₂ and CH₂ emissions from sewage and digestion slurry, two types of wastewater. A portable gas analyzer and stable chamber method were used to determine the pollution during 21 days. Results show that compared to unprocessed substrates, adding biochar in a 2:1 ratio significantly reduces emissions of CO2 and CH4. The high pollution levels of slurry highlight the need for immediate action to reduce these levels. Sewage emissions of CO2 and CH4 are reduced by 39% and 41%, respectively, when biochar is included. The digestate is the most essential component as it reduces the production of CO2 by 58% and CH4 by 92%. Despite manure displaying reducing emission tendencies, adding biochar still results in substantial reductions, with carbon dioxide (CO2) releases dropping by 52% and CH4 emissions falling by 88%, respectively. Biochar application reduces digestate's Global Warming Capability by 67%, slurry's by 29%, and manure's by 57%, mitigating environmental consequences across all treatments.