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A cellulosic yarn, functionalised by amine containing molecules, has been developed to capture CO₂ from the surrounding air. This project has developed cellulosic yarns with CO₂ adsorbing properties by TEMPO mediated oxidation of cellulose and amine functionalisation via a grafting reaction. These yarns can be used to produce textiles and may contribute to the reduction of CO₂ levels in the environment if they are used in large quantities in everyday life. This invention is a new product fostering sustainable development of the environment.