Abstract
People are often unaware that everyday behavior and lifestyle choices involving food, exercise, and shopping all have varying levels of consequences on the environment. In fact, this makes it difficult for people to understand the mutual relationship between personal health and the environmental health. My thesis investigates a lifestyle intervention that emphasizes the mutual benefits of pro-health and pro-environmental behaviors. I further intend to investigate online prosocial interaction in this intervention and its impact on participant motivation to engage in proenvironmental behaviors.