The Center for Responsible Travel (CREST), in cooperation with UN Environment, has compiled this resource packet as part of our commitment to supporting the UN’s 2017 International Year of Sustainable Tourism for Development (IY2017). Throughout the tourism industry, there are many initiatives and advocacy campaigns that promote innovative best practices, codes of conduct, and certification programs, all designed to help deepen our understanding of, and commitment to, sustainable travel. This directory contains valuable information on a range of topics that are critical to ensuring that businesses operate more sustainability and travelers make more informed and earth-friendly decisions.