This paper asks whether more diverse companies are more committed to the fight against climate change than less diverse companies. Workforce diversity is measured along several socio-demographic dimensions: age, gender, race, and presence in European Union countries. The paper develops the concept of Environmental Workplace Behavior, which explains how environmental attitudes and beliefs influence work decisions. The dependent variable is a climate change index calculated by a non-profit organization, for a sample of Fortune 500 companies. A cross-sectional research design is employed, using ordinary least squares (OLS) regression to analyze the data. The results suggest that companies that employ more women and have a stronger European presence tend to exhibit a higher concern for climate change. Companies do not seem to involve minorities and young people in meaningful decision-making regarding climate change actions and initiatives. Future research might analyze other diversity dimensions, such as gender orientation, education, political liberalism, or religious affiliation.