Control of the environment through biochar as a sustainable agricultural product and its control over climatic change is increasingly making it an acceptable compound. Not only can it lock up heavy metals, break down natural contaminants, but it could also provide an answer to the newcomers such as microplastic pollution due to its porous structure and chemical resistance. Biochar is significant in the agricultural land in the promotion of the quality of the soil by enhancing the soil texture, trapping of desirable nutrients, and the acquisition of the salutary macrobiotic effect. The properties are not only making the soil fertile, but also allowing crops to resist the climatic stresses like salinity, droughts and plant diseases and hence biochar creates a death grip in the struggle to foster condition-resistant agriculture. The best benefit of biochar is that it can potentially bind carbon and is therefore a good candidate of a negative emission technology that can be employed to offset emission of greenhouse gases around the globe. Other than environmental application, the new studies have now switched to engineered biochar that is also finding application in the biomedical field. Researchers indicate that it could be used to deliver drugs, heal wound infections and act as an antimicrobial due to its potential applications; the possibilities of using the compound extend beyond the traditional agricultural or environmental use. In addition to direct applications, biochar plays a major role in the global economy in the transformation of waste products like crop residues, sewage sludge, and products to useful resources. This process does not only contribute to a reduction of environmental strain but also leads to the achievement of a number of the United Nations Sustainable Development Goals (SDGs). Specifically, biochar fits into SDG 7 on access to affordable and clean energy as well as SDG 12 on responsible consumption and production and SDG 13 on climate action, but also has a wider scope as part of sustainable development. The future prospects of biochar will be determined to a large extent by developments regarding the material being modified, cost effective and large-scale production and comprehensive life cycle evaluation. These measures play a vital role when it comes to closing the divide between laboratory tests and practice, so that the innovative applications of the biochar could be expanded and potentially it would be integrated into the industrial systems.