In an embodiment, a method provides a carbon footprint comparison. In this method, a request to compare a first carbon footprint associated with a first user is received. Here, first profile attributes and the first carbon footprint associated with the first user are accessed. Additionally, second profile attributes associated with a second user are accessed. A match of a first number of the first profile attributes with a second number of the second profile attributes is identified. With the match, a strength of the match is calculated based on a number of identified matching profile attributes. A response to the request is then transmitted, and this response comprises the strength of the match and the first carbon footprint.