Supplement to Letter on High N2O Emissions from Rice

This document comprises supplementary information to a Letter to the Editor published by Proceedings of the National Academy of Sciences of the United States of America (PNAS). The letter and the supplement have been written by 17 authors from the International Rice Research Institute as well as other research institutes and academe. The rationale of the letter and this supplement is to clarify the author’s position on a recent PNAS article that reports very high emissions of nitrous oxide from rice fields. Collectively, these two documents elaborate on several concerns regarding some generalizations of this PNAS article that are deemed unfounded and speculative.