The document summarizes the Menlo Park Drive Less Challenge, which aims to reduce greenhouse gas emissions through a friendly social competition. The biggest source of carbon emissions in Menlo Park comes from vehicles. The challenge encourages participation through schools, workplaces, neighborhoods, and faith communities by logging trips taken for one week after Earth Day. Over 120 participants logged nearly 500 green trips, equivalent to removing 17 cars from the road. Improvements are needed to scale the program and make it easier and more social for participants.