The latest Greendex survey by the National Geographic Society and the research consulting firm GlobeScan measured consumption habits and attitudes in 18 countries. Each was scored on the relative size of its environmental footprint. This year's report, the fifth since 2008, focused on food.

This 17 nation survey on consumer behavior and environmental impact by National Geographic & Globescan revealed that environmentally friendly behaviour in 10 of 17 countries has increased and India has the most sustainable consumption pattern.

The central component of this research initiative is the creation of a composite index of environmentally sustainable consumption called the Greendex. The Greendex will be used over time to monitor and report changes in consumer behavior by replicating the research annually.