Climate change is a “wicked” problem resulting from overconsumption. This thesis illustrates the importance of addressing sustainable consumption and aims toward helping consumers change their shopping patterns and live a sustainable life in the long run. AR may help in increasing environmental awareness of consumption, providing available information on sustainable consumption, and ways to reduce the Value-Action Gap through the design of AR Consumption Reducing System. By employing the mixed methodology of Research Through Design and Speculative Design, a prototype AR tool with an engagement system for sustainable consumption decision making named ARCS (AR Consumption Reducing App )was developed. Two personas were developed following the speculative design methodology in order to show how the prototype could lead from a probable and plausible to a preferred future.