Circular agriculture represents a paradigm shift from the conventional linear "take-make-dispose" model to a regenerative, closed-loop farming system that maximizes resource efficiency and minimizes waste. As global food demand is projected to increase by 70% by 2050, the transition toward circular agricultural practices has become imperative for achieving sustainable food production. This review examines the core principles of circular agriculture, including nutrient recycling, crop-livestock integration, waste valorization through composting and anaerobic digestion, and the role of precision agriculture technologies in enhancing resource use efficiency. Case studies from various global regions demonstrate the economic and environmental viability of these approaches. The paper also identifies key challenges such as infrastructure limitations, policy gaps, and socio-economic barriers, while highlighting future prospects for scaling circular agriculture through technological innovation and collaborative governance frameworks.

Keywords: Circular Agriculture, Waste Recycling, Resource Efficiency, Nutrient Cycling, Sustainable Farming.