Sustainable consumer behavior is consumers’ behaviors that improve social and environmental performance as well as meet their needs. It studies why and how consumers do or do not incorporate sustainability issues into their consumption behavior. Also, it studies what products consumers do or do not buy, how they use them and what they do with them afterwards. One mechanism to spread information about sustainable consumer behavior is word of mouth. Sustainable consumer behavior is consumers’ behaviors that improve social and environmental performance as well as meet their needs. It studies why and how consumers do or do not incorporate sustainability issues into their consumption behavior. Also, it studies what products consumers do or do not buy, how they use them and what they do with them afterwards. One mechanism to spread information about sustainable consumer behavior is word of mouth.