The purpose of this study is to investigate organizational commitment and environmental anxiety of employees working in hotels with "eco-friendly institution" licence (green-star hotels) and to analyze whether green star hotel employees have more sustainable behaviors in their daily lives as they are trained in terms of environmental issues at their work places. Data is collected from four hotels in Turkey, where two of them have a green-star licence. Data gathered from 238 employees working in hotels revealed that green-star hotel employees have higher affective organizational commitment and higher sustainable behavior than the non-green hotel employees. Another result of this study puts forward that sustainable behavior mediates the relationship between affective commitment and the anxiety level of individuals about the environment. The study discusses important effects of green-star campaign as an important implication of corporate social responsibility (CSR) to Turkish tourism sector.