Food waste biochar is a promising sustainable solution for agriculture and soil-water remediation. This review discusses the production of biochar from food waste through pyrolysis and its applications in agriculture and environmental remediation. Biochar, a carbon-enriched soil amendment, has excellent properties for improving soil fertility, nutrient retention, water retention, microbial activity, plant growth, and pollution remediation. The pyrolysis process at low and medium temperatures produces biochar with enhanced properties such as carbon content, BET surface area, cation exchange capacity, zeta potential, and nutrient content, while minimizing ash content. This biochar improves soil water and nutrient retention, crop yield, and microbial community. Additionally, food waste to biochar is a realistic adsorbent and economical carbon sequestration method to mitigate greenhouse gas emissions. The review highlights the potential of food waste biochar as a sustainable solution for agriculture and environmental remediation. It also identifies knowledge gaps and future research directions for researchers, stakeholders, and policymakers to make informed decisions for food waste valorization. The review emphasizes the importance of sustainable agriculture, soil-water remediation, nutrient retention, soil microbial activity, and greenhouse gas mitigation. Biochar is a good carbon sequestrator and a bioeconomy product for the farmer's community and policymakers. The review concludes that food waste biochar is a promising amendment for agriculture and soil-water remediation, with potential to improve soil fertility, microbial activity, soil water and nutrient retention capacity, and plant growth. It also has the potential to mitigate greenhouse gas emissions and improve the farmer's economy. The review encourages researchers, stakeholders, and policymakers to make the best possible decisions for food waste valorization.Food waste biochar is a promising sustainable solution for agriculture and soil-water remediation. This review discusses the production of biochar from food waste through pyrolysis and its applications in agriculture and environmental remediation. Biochar, a carbon-enriched soil amendment, has excellent properties for improving soil fertility, nutrient retention, water retention, microbial activity, plant growth, and pollution remediation. The pyrolysis process at low and medium temperatures produces biochar with enhanced properties such as carbon content, BET surface area, cation exchange capacity, zeta potential, and nutrient content, while minimizing ash content. This biochar improves soil water and nutrient retention, crop yield, and microbial community. Additionally, food waste to biochar is a realistic adsorbent and economical carbon sequestration method to mitigate greenhouse gas emissions. The review highlights the potential of food waste biochar as a sustainable solution for agriculture and environmental remediation. It also identifies knowledge gaps and future research directions for researchers, stakeholders, and policymakers to make informed decisions for food waste valorization. The review emphasizes the importance of sustainable agriculture, soil-water remediation, nutrient retention, soil microbial activity, and greenhouse gas mitigation. Biochar is a good carbon sequestrator and a bioeconomy product for the farmer's community and policymakers. The review concludes that food waste biochar is a promising amendment for agriculture and soil-water remediation, with potential to improve soil fertility, microbial activity, soil water and nutrient retention capacity, and plant growth. It also has the potential to mitigate greenhouse gas emissions and improve the farmer's economy. The review encourages researchers, stakeholders, and policymakers to make the best possible decisions for food waste valorization.