MOC Hydrogel tackles urban odour pollution with a biodegradable hydrogel that suppresses hydrogen sulfide and volatile compounds at source. Designed for drainage systems and waste facilities, it targets odour-causing bacteria and releases active ingredients over 30 days, reducing emissions by over 90%. The low-cost, low-maintenance system avoids harmful chemicals and improves hygiene and air quality for surrounding communities. Its dual action also prevents biofilm regrowth, offering a long-lasting, scalable solution aligned with sustainable urban development goals