This study will focus on summer faculty-led study abroad programs in Australia, New Zealand, and Fiji. These programs lasted from 10 days to four weeks. The course contents were paired with the sites visited to facilitate experiential learning. The theme of the program was sustaining human and the environment. Most of the participants were U.S. undergraduate students enrolled in a four-year university from different majors. All of the alumni from 2007 to 2018 will be invited to partake this study. An on-line structured questionnaire will be used for data collection. The questionnaire will include three 7-point Likert scales to examine the constructs of global citizenship (Morais & Ogden, 2011), environmental attitudes (Dunlap, Van Liere, Mertig, & Jones, 2003), and pro-environmental behaviors (Tarrant et al., 2014). Quantitative methods will be used to analyze the scale data. Additionally, demographic information and study abroad experiences will be asked through open ended questions. These results will be analyzed by qualitative methods.