This is the fifth year National Geographic has partnered with GlobeScan to develop an international research approach to measure and monitor consumer progress towards environmentally sustainable consumption. The key objectives of this unprecedented consumer tracking survey are to provide regular quantitative measures of consumer behavior and to promote sustainable consumption. The central component of this research initiative is the creation of a composite index ofenvironmentally sustainable consumption called the Greendex. The Greendex will be used over time to monitor and report changes in consumer behavior by replicating the research on an ongoing basis.