TRB's Airport Cooperative Research Program (ACRP) Synthesis 77: Airport Sustainability Practices compiles information about airport sustainability practices and adds them to the Sustainable Aviation Guidance Alliance (SAGA) website. The SAGA website was developed to assist airport operators in developing sustainability programs and provide guidance to those who have new data to input. The website contains entries on more than 900 sustainability practices that were developed by SAGA’s initial stakeholder group. However, a large percentage of these entries do not contain actual practice data.