Last month, India protested against its ranking on the Environmental Performance Index (EPI) of 2022, prepared by researchers at the Yale and Columbia Universities in the U.S. The report measures 40 performance indicators across 11 categories to measure the “state of sustainability around the world.” India was ranked last (180) with low scores across a range of indicators. The Indian Government as well as environment experts have pointed to the faulty methodology of the index that skews the results in favour of the Global North. Chandra Bhushan, Sharad Lele and Anant Sudarshan discuss the report in a conversation moderated by Sonikka Loganathan. Edited excerpts:

What are the issues with the methodology?

Chandra Bhushan: Rating by its very nature is a subjective exercise. But a good rating is one that tries to reduce subjectivity, normalises all indicators, and then develops consensus around the subjective issues.